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柔光的暖阳◎ 2022-08-20 03:26 205阅读 0赞

<table style="margin:0px; padding:0px; border-spacing:0px; border-collapse:collapse; border:1px solid silver; word-break:break-word; color:rgb(73,73,73); font-size:14px; line-height:22.4px; background-color:rgb(244,237,227)"> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 状态名 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 作用域 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 详细解释 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Aborted_clients </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 由于客户端没有正确关闭连接导致客户端终止而中断的连接数 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Aborted_connects </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 试图连接到MySQL服务器而失败的连接数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Binlog_cache_disk_use </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 使用临时二进制日志缓存但超过binlog_cache_size值并使用临时文件来保存事务中的语句的事务数量 </td> 
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 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Binlog_cache_use </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 使用临时二进制日志缓存的事务数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Binlog_stmt_cache_disk_use </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Binlog_stmt_cache_use </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Bytes_received </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从所有客户端接收到的字节数。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Bytes_sent </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 发送给所有客户端的字节数。 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Com* </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 各种数据库操作的数量 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Compression </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Session </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 客户端与服务器之间只否启用压缩协议 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Connections </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 试图连接到(不管是否成功)MySQL服务器的连接数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Created_tmp_disk_tables </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 服务器执行语句时在硬盘上自动创建的临时表的数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Created_tmp_files </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> mysqld已经创建的临时文件的数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Created_tmp_tables </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 服务器执行语句时自动创建的内存中的临时表的数量。如果Created_tmp_disk_tables较大，你可能要增加tmp_table_size值使临时&nbsp;表基于内存而不基于硬盘 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Delayed_errors </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 用INSERT DELAYED写的出现错误的行数(可能为duplicate key)。 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Delayed_insert_threads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 使用的INSERT DELAYED处理器线程数。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Delayed_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 写入的INSERT DELAYED行数 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Flush_commands </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 执行的FLUSH语句数。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_commit </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 内部提交语句数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_delete </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 行从表中删除的次数。 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_discover </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> MySQL服务器可以问NDB CLUSTER存储引擎是否知道某一名字的表。这被称作发现。Handler_discover说明通过该方法发现的次数。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_prepare </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> A counter for the prepare phase of two-phase commit operations. </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_first </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 索引中第一条被读的次数。如果较高，它建议服务器正执行大量全索引扫描；例如，SELECT col1 FROM foo，假定col1有索引。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_key </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 根据键读一行的请求数。如果较高，说明查询和表的索引正确。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_next </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 按照键顺序读下一行的请求数。如果你用范围约束或如果执行索引扫描来查询索引列，该值增加。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_prev </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 按照键顺序读前一行的请求数。该读方法主要用于优化ORDER BY … DESC。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_rnd </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 根据固定位置读一行的请求数。如果你正执行大量查询并需要对结果进行排序该值较高。你可能使用了大量需要MySQL扫描整个表的查询或你的连接没有正确使用键。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_rnd_next </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在数据文件中读下一行的请求数。如果你正进行大量的表扫描，该值较高。通常说明你的表索引不正确或写入的查询没有利用索引。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_read_last </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_rollback </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 内部ROLLBACK语句的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_savepoint </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在一个存储引擎放置一个保存点的请求数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_savepoint_rollback </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在一个存储引擎的要求回滚到一个保存点数目。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_update </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在表内更新一行的请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Handler_write </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在表内插入一行的请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_data </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 包含数据的页数(脏或干净)。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_dirty </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前的脏页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_flushed </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 要求清空的缓冲池页数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_free </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 空页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_latched </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在InnoDB缓冲池中锁定的页数。这是当前正读或写或由于其它原因不能清空或删除的页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_misc </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 忙的页数，因为它们已经被分配优先用作管理，例如行锁定或适用的哈希索引。该值还可以计算为Innodb_buffer_pool_pages_total – Innodb_buffer_pool_pages_free – Innodb_buffer_pool_pages_data。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_pages_total </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 缓冲池总大小（页数）。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_read_ahead_rnd </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> InnoDB初始化的“随机”read-aheads数。当查询以随机顺序扫描表的一大部分时发生。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_read_ahead_seq </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> InnoDB初始化的顺序read-aheads数。当InnoDB执行顺序全表扫描时发生。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_read_requests </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> InnoDB已经完成的逻辑读请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_reads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 不能满足InnoDB必须单页读取的缓冲池中的逻辑读数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_wait_free </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 一般情况，通过后台向InnoDB缓冲池写。但是，如果需要读或创建页，并且没有干净的页可用，则它还需要先等待页面清空。该计数器对等待实例进行记数。如果已经适当设置缓冲池大小，该值应小。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_buffer_pool_write_requests </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 向InnoDB缓冲池的写数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_fsyncs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> fsync()操作数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_pending_fsyncs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前挂起的fsync()操作数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_pending_reads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前挂起的读数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_pending_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前挂起的写数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_read </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 至此已经读取的数据数量（字节）。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_reads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 数据读总数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 数据写总数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_data_written </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 至此已经写入的数据量（字节）。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_dblwr_pages_written </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 已经执行的双写操作数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_dblwr_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 双写操作已经写好的页数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_log_waits </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 我们必须等待的时间，因为日志缓冲区太小，我们在继续前必须先等待对它清空 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_log_write_requests </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 日志写请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_log_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 向日志文件的物理写数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_os_log_fsyncs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 向日志文件完成的fsync()写数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_os_log_pending_fsyncs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 挂起的日志文件fsync()操作数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_os_log_pending_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 挂起的日志文件写操作 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_os_log_written </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 写入日志文件的字节数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_page_size </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 编译的InnoDB页大小(默认16KB)。许多值用页来记数；页的大小很容易转换为字节。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_pages_created </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 创建的页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_pages_read </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 读取的页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_pages_written </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 写入的页数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_row_lock_current_waits </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前等待的待锁定的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_row_lock_time </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 行锁定花费的总时间，单位毫秒。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_row_lock_time_avg </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 行锁定的平均时间，单位毫秒。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_row_lock_time_max </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 行锁定的最长时间，单位毫秒。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_row_lock_waits </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 一行锁定必须等待的时间数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_rows_deleted </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从InnoDB表删除的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_rows_inserted </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 插入到InnoDB表的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_rows_read </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从InnoDB表读取的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_rows_updated </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> InnoDB表内更新的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Innodb_truncated_status_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_blocks_not_flushed </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 键缓存内已经更改但还没有清空到硬盘上的键的数据块数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_blocks_unused </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 键缓存内未使用的块数量。你可以使用该值来确定使用了多少键缓存 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_blocks_used </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 键缓存内使用的块数量。该值为高水平线标记，说明已经同时最多使用了多少块。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_read_requests </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从缓存读键的数据块的请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_reads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从硬盘读取键的数据块的次数。如果Key_reads较大，则Key_buffer_size值可能太小。可以用Key_reads/Key_read_requests计算缓存损失率。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_write_requests </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 将键的数据块写入缓存的请求数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Key_writes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 向硬盘写入将键的数据块的物理写操作的次数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Last_query_cost </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Session </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 用查询优化器计算的最后编译的查询的总成本。用于对比同一查询的不同查询方案的成本。默认值0表示还没有编译查询。默认值是0。Last_query_cost具有会话范围。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Max_used_connections </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 服务器启动后已经同时使用的连接的最大数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> ndb* </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> ndb集群相关 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Not_flushed_delayed_rows </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 等待写入INSERT DELAY队列的行数。 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Open_files </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 打开的文件的数目。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Open_streams </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 打开的流的数量(主要用于记录)。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Open_table_definitions </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 缓存的.frm文件数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Open_tables </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前打开的表的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Opened_files </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 文件打开的数量。不包括诸如套接字或管道其他类型的文件。&nbsp;也不包括存储引擎用来做自己的内部功能的文件。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Opened_table_definitions </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 已经缓存的.frm文件数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Opened_tables </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 已经打开的表的数量。如果Opened_tables较大，table_cache&nbsp;值可能太小。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Prepared_stmt_count </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前的预处理语句的数量。&nbsp;(最大数为系统变量: max_prepared_stmt_count)&nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_free_blocks </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 查询缓存内自由内存块的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_free_memory </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 用于查询缓存的自由内存的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_hits </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 查询缓存被访问的次数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_inserts </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 加入到缓存的查询数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_lowmem_prunes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 由于内存较少从缓存删除的查询数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_not_cached </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 非缓存查询数(不可缓存，或由于query_cache_type设定值未缓存)。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_queries_in_cache </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 登记到缓存内的查询的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_total_blocks </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 查询缓存内的总块数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_queries_in_cache </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Qcache_total_blocks </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Queries </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 服务器执行的请求个数，包含存储过程中的请求。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Questions </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 已经发送给服务器的查询的个数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Rpl_status </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 失败安全复制状态(还未使用)。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Select_full_join </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有使用索引的联接的数量。如果该值不为0,你应仔细检查表的索引 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Select_full_range_join </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在引用的表中使用范围搜索的联接的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Select_range </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在第一个表中使用范围的联接的数量。一般情况不是关键问题，即使该值相当大。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Select_range_check </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在每一行数据后对键值进行检查的不带键值的联接的数量。如果不为0，你应仔细检查表的索引。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Select_scan </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 对第一个表进行完全扫描的联接的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slave_heartbeat_period </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 复制的心跳间隔 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slave_open_temp_tables </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从服务器打开的临时表数量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slave_received_heartbeats </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 从服务器心跳数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slave_retried_transactions </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 本次启动以来从服务器复制线程重试次数 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slave_running </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 如果该服务器是连接到主服务器的从服务器，则该值为ON。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slow_launch_threads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 创建时间超过slow_launch_time秒的线程数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Slow_queries </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 查询时间超过long_query_time秒的查询的个数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Sort_merge_passes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 排序算法已经执行的合并的数量。如果这个变量值较大，应考虑增加sort_buffer_size系统变量的值。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Sort_range </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在范围内执行的排序的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Sort_rows </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 已经排序的行数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Sort_scan </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Both </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 通过扫描表完成的排序的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> ssl＊ </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> ssl连接相关 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Table_locks_immediate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 立即获得的表的锁的次数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Table_locks_waited </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 不能立即获得的表的锁的次数。如果该值较高，并且有性能问题，你应首先优化查询，然后拆分表或使用复制。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Threads_cached </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 线程缓存内的线程的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Threads_connected </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当前打开的连接的数量。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Threads_created </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 创建用来处理连接的线程数。如果Threads_created较大，你可能要增加thread_cache_size值。缓存访问率的计算方法Threads_created/Connections。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Threads_running </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 激活的（非睡眠状态）线程数。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Uptime </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 服务器已经运行的时间（以秒为单位）。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Uptime_since_flush_status </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> Global </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 最近一次使用FLUSH STATUS&nbsp;的时间（以秒为单位）。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 </tr> 
 </tbody> 
</table>