memcache1.5.8——stats 状态解释

墨蓝 2022-05-21 09:46 280阅读 0赞

本文参考：

[https://github.com/memcached/memcached/blob/master/doc/protocol.txt][https_github.com_memcached_memcached_blob_master_doc_protocol.txt]

|-----------------------+---------+-------------------------------------------|

| Name | Type | Meaning |

|-----------------------+---------+-------------------------------------------|

| pid | 32u | Process id of this server process |

| uptime | 32u | Number of secs since the server started |

| time | 32u | current UNIX time according to the server |

| version | string | Version string of this server |

| pointer\_size | 32 | Default size of pointers on the host OS |

| | | (generally 32 or 64) |

| rusage\_user | 32u.32u | Accumulated user time for this process |

| | | (seconds:microseconds) |

| rusage\_system | 32u.32u | Accumulated system time for this process |

| | | (seconds:microseconds) |

| curr\_items | 64u | Current number of items stored |

| total\_items | 64u | Total number of items stored since |

| | | the server started |

| bytes | 64u | Current number of bytes used |

| | | to store items |

| max\_connections | 32u | Max number of simultaneous connections |

| curr\_connections | 32u | Number of open connections |

| total\_connections | 32u | Total number of connections opened since |

| | | the server started running |

| rejected\_connections | 64u | Conns rejected in maxconns\_fast mode |

| connection\_structures | 32u | Number of connection structures allocated |

| | | by the server |

| reserved\_fds | 32u | Number of misc fds used internally |

| cmd\_get | 64u | Cumulative number of retrieval reqs |

| cmd\_set | 64u | Cumulative number of storage reqs |

| cmd\_flush | 64u | Cumulative number of flush reqs |

| cmd\_touch | 64u | Cumulative number of touch reqs |

| get\_hits | 64u | Number of keys that have been requested |

| | | and found present |

| get\_misses | 64u | Number of items that have been requested |

| | | and not found |

| get\_expired | 64u | Number of items that have been requested |

| | | but had already expired. |

| get\_flushed | 64u | Number of items that have been requested |

| | | but have been flushed via flush\_all |

| delete\_misses | 64u | Number of deletions reqs for missing keys |

| delete\_hits | 64u | Number of deletion reqs resulting in |

| | | an item being removed. |

| incr\_misses | 64u | Number of incr reqs against missing keys. |

| incr\_hits | 64u | Number of successful incr reqs. |

| decr\_misses | 64u | Number of decr reqs against missing keys. |

| decr\_hits | 64u | Number of successful decr reqs. |

| cas\_misses | 64u | Number of CAS reqs against missing keys. |

| cas\_hits | 64u | Number of successful CAS reqs. |

| cas\_badval | 64u | Number of CAS reqs for which a key was |

| | | found, but the CAS value did not match. |

| touch\_hits | 64u | Number of keys that have been touched |

| | | with a new expiration time |

| touch\_misses | 64u | Number of items that have been touched |

| | | and not found |

| auth\_cmds | 64u | Number of authentication commands |

| | | handled, success or failure. |

| auth\_errors | 64u | Number of failed authentications. |

| idle\_kicks | 64u | Number of connections closed due to |

| | | reaching their idle timeout. |

| evictions | 64u | Number of valid items removed from cache |

| | | to free memory for new items |

| reclaimed | 64u | Number of times an entry was stored using |

| | | memory from an expired entry |

| bytes\_read | 64u | Total number of bytes read by this server |

| | | from network |

| bytes\_written | 64u | Total number of bytes sent by this server |

| | | to network |

| limit\_maxbytes | size\_t | Number of bytes this server is allowed to |

| | | use for storage. |

| accepting\_conns | bool | Whether or not server is accepting conns |

| listen\_disabled\_num | 64u | Number of times server has stopped |

| | | accepting new connections (maxconns). |

| time\_in\_listen\_disabled\_us |

| | 64u | Number of microseconds in maxconns. |

| threads | 32u | Number of worker threads requested. |

| | | (see doc/threads.txt) |

| conn\_yields | 64u | Number of times any connection yielded to |

| | | another due to hitting the -R limit. |

| hash\_power\_level | 32u | Current size multiplier for hash table |

| hash\_bytes | 64u | Bytes currently used by hash tables |

| hash\_is\_expanding | bool | Indicates if the hash table is being |

| | | grown to a new size |

| expired\_unfetched | 64u | Items pulled from LRU that were never |

| | | touched by get/incr/append/etc before |

| | | expiring |

| evicted\_unfetched | 64u | Items evicted from LRU that were never |

| | | touched by get/incr/append/etc. |

| evicted\_active | 64u | Items evicted from LRU that had been hit |

| | | recently but did not jump to top of LRU |

| slab\_reassign\_running | bool | If a slab page is being moved |

| slabs\_moved | 64u | Total slab pages moved |

| crawler\_reclaimed | 64u | Total items freed by LRU Crawler |

| crawler\_items\_checked | 64u | Total items examined by LRU Crawler |

| lrutail\_reflocked | 64u | Times LRU tail was found with active ref. |

| | | Items can be evicted to avoid OOM errors. |

| moves\_to\_cold | 64u | Items moved from HOT/WARM to COLD LRU's |

| moves\_to\_warm | 64u | Items moved from COLD to WARM LRU |

| moves\_within\_lru | 64u | Items reshuffled within HOT or WARM LRU's |

| direct\_reclaims | 64u | Times worker threads had to directly |

| | | reclaim or evict items. |

| lru\_crawler\_starts | 64u | Times an LRU crawler was started |

| lru\_maintainer\_juggles |

| | 64u | Number of times the LRU bg thread woke up |

| slab\_global\_page\_pool | 32u | Slab pages returned to global pool for |

| | | reassignment to other slab classes. |

| slab\_reassign\_rescues | 64u | Items rescued from eviction in page move |

| slab\_reassign\_evictions\_nomem |

| | 64u | Valid items evicted during a page move |

| | | (due to no free memory in slab) |

| slab\_reassign\_chunk\_rescues |

| | 64u | Individual sections of an item rescued |

| | | during a page move. |

| slab\_reassign\_inline\_reclaim |

| | 64u | Internal stat counter for when the page |

| | | mover clears memory from the chunk |

| | | freelist when it wasn't expecting to. |

| slab\_reassign\_busy\_items |

| | 64u | Items busy during page move, requiring a |

| | | retry before page can be moved. |

| slab\_reassign\_busy\_deletes |

| | 64u | Items busy during page move, requiring |

| | | deletion before page can be moved. |

| log\_worker\_dropped | 64u | Logs a worker never wrote due to full buf |

| log\_worker\_written | 64u | Logs written by a worker, to be picked up |

| log\_watcher\_skipped | 64u | Logs not sent to slow watchers. |

| log\_watcher\_sent | 64u | Logs written to watchers. |

|-----------------------+---------+-------------------------------------------|

具体示例如下：

stats
    STAT pid 15522
    STAT uptime 98056
    STAT time 1530700503
    STAT version 1.5.8
    STAT libevent 2.0.21-stable
    STAT pointer_size 64
    STAT rusage_user 2811.299695
    STAT rusage_system 4508.125740
    STAT max_connections 65535
    STAT curr_connections 121
    STAT total_connections 3721
    STAT rejected_connections 0
    STAT connection_structures 124
    STAT reserved_fds 20
    STAT cmd_get 96127593
    STAT cmd_set 14525514
    STAT cmd_flush 0
    STAT cmd_touch 0
    STAT get_hits 91326387
    STAT get_misses 4801206
    STAT get_expired 111685
    STAT get_flushed 0
    STAT delete_misses 3204612
    STAT delete_hits 18507
    STAT incr_misses 0
    STAT incr_hits 0
    STAT decr_misses 0
    STAT decr_hits 0
    STAT cas_misses 0
    STAT cas_hits 0
    STAT cas_badval 0
    STAT touch_hits 0
    STAT touch_misses 0
    STAT auth_cmds 0
    STAT auth_errors 0
    STAT bytes_read 11103533842
    STAT bytes_written 25393487744
    STAT limit_maxbytes 17876123648
    STAT accepting_conns 1
    STAT listen_disabled_num 0
    STAT time_in_listen_disabled_us 0
    STAT threads 4
    STAT conn_yields 0
    STAT hash_power_level 19
    STAT hash_bytes 4194304
    STAT hash_is_expanding 0
    STAT slab_reassign_rescues 69103
    STAT slab_reassign_chunk_rescues 0
    STAT slab_reassign_evictions_nomem 0
    STAT slab_reassign_inline_reclaim 1934
    STAT slab_reassign_busy_items 64
    STAT slab_reassign_busy_deletes 0
    STAT slab_reassign_running 0
    STAT slabs_moved 103
    STAT lru_crawler_running 0
    STAT lru_crawler_starts 267464
    STAT lru_maintainer_juggles 15732152
    STAT malloc_fails 0
    STAT log_worker_dropped 0
    STAT log_worker_written 0
    STAT log_watcher_skipped 0
    STAT log_watcher_sent 0
    STAT bytes 198830012
    STAT curr_items 604336
    STAT total_items 14594617
    STAT slab_global_page_pool 3
    STAT expired_unfetched 1336030
    STAT evicted_unfetched 0
    STAT evicted_active 0
    STAT evictions 0
    STAT reclaimed 23511
    STAT crawler_reclaimed 2564863
    STAT crawler_items_checked 557631358
    STAT lrutail_reflocked 17
    STAT moves_to_cold 2673691
    STAT moves_to_warm 1022433
    STAT moves_within_lru 485165
    STAT direct_reclaims 0
    STAT lru_bumps_dropped 0
    END

[https_github.com_memcached_memcached_blob_master_doc_protocol.txt]: https://github.com/memcached/memcached/blob/master/doc/protocol.txt