JVM辅助信息参数设置

╰半橙微兮° 2023-10-07 09:16 0阅读 0赞

**辅助信息**

<table> 
 <thead> 
  <tr> 
   <th>-XX:+PrintGC</th> 
   <th></th> 
   <th></th> 
   <th>输出形式:[GC 118250K-&gt;113543K(130112K), 0.0094143 secs] [Full GC 121376K-&gt;10414K(130112K), 0.0650971 secs]</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>-XX:+PrintGCDetails</td> 
   <td></td> 
   <td></td> 
   <td>输出形式:[GC [DefNew: 8614K-&gt;781K(9088K), 0.0123035 secs] 118250K-&gt;113543K(130112K), 0.0124633 secs] [GC [DefNew: 8614K-&gt;8614K(9088K), 0.0000665 secs][Tenured: 112761K-&gt;10414K(121024K), 0.0433488 secs] 121376K-&gt;10414K(130112K), 0.0436268 secs]</td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintGCTimeStamps</td> 
   <td></td> 
   <td></td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintGC:PrintGCTimeStamps</td> 
   <td></td> 
   <td></td> 
   <td>可与-XX:+PrintGC -XX:+PrintGCDetails混合使用 输出形式:11.851: [GC 98328K-&gt;93620K(130112K), 0.0082960 secs]</td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintGCApplicationStoppedTime</td> 
   <td>打印垃圾回收期间程序暂停的时间.可与上面混合使用</td> 
   <td></td> 
   <td>输出形式:Total time for which application threads were stopped: 0.0468229 seconds</td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintGCApplicationConcurrentTime</td> 
   <td>打印每次垃圾回收前,程序未中断的执行时间.可与上面混合使用</td> 
   <td></td> 
   <td>输出形式:Application time: 0.5291524 seconds</td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintHeapAtGC</td> 
   <td>打印GC前后的详细堆栈信息</td> 
   <td></td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>-Xloggc:filename</td> 
   <td>把相关日志信息记录到文件以便分析. 与上面几个配合使用</td> 
   <td></td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintClassHistogram</td> 
   <td>garbage collects before printing the histogram.</td> 
   <td></td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>-XX:+PrintTLAB</td> 
   <td>查看TLAB空间的使用情况</td> 
   <td></td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>XX:+PrintTenuringDistribution</td> 
   <td>查看每次minor GC后新的存活周期的阈值</td> 
   <td></td> 
   <td>Desired survivor size 1048576 bytes, new threshold 7 (max 15) new threshold 7即标识新的存活周期的阈值为7。</td> 
  </tr> 
 </tbody> 
</table>