获取GC收集器名称

短命女 2022-03-01 05:40 116阅读 0赞

组合如下：

<table> 
 <thead> 
 <tr> 
 <th>Young</th> 
 <th>Tenured</th> 
 <th>JVM options</th> 
 </tr> 
 </thead> 
 <tbody> 
 <tr> 
 <td>Incremental(增量GC)</td> 
 <td>Incremental</td> 
 <td>-Xincgc</td> 
 </tr> 
 <tr> 
 <td>Serial</td> 
 <td>Serial</td> 
 <td>-XX:+UseSerialGC</td> 
 </tr> 
 <tr> 
 <td>Parallel Scavenge</td> 
 <td>Serial</td> 
 <td>-XX:+UseParallelGC -XX:-UseParallelOldGC</td> 
 </tr> 
 <tr> 
 <td>Parallel New</td> 
 <td>Serial</td> 
 <td>N/A</td> 
 </tr> 
 <tr> 
 <td>Serial</td> 
 <td>Parallel Old</td> 
 <td>N/A</td> 
 </tr> 
 <tr> 
 <td>Parallel Scavenge</td> 
 <td>Parallel Old</td> 
 <td>-XX:+UseParallelGC -XX:+UseParallelOldGC</td> 
 </tr> 
 <tr> 
 <td>Parallel New</td> 
 <td>Parallel Old</td> 
 <td>N/A</td> 
 </tr> 
 <tr> 
 <td>Serial</td> 
 <td>CMS</td> 
 <td>-XX:-UseParNewGC -XX:+UseConcMarkSweepGC</td> 
 </tr> 
 <tr> 
 <td>Parallel Scavenge</td> 
 <td>CMS</td> 
 <td>N/A</td> 
 </tr> 
 <tr> 
 <td>Parallel New</td> 
 <td>CMS</td> 
 <td>-XX:+UseParNewGC -XX:+UseConcMarkSweepGC</td> 
 </tr> 
 <tr> 
 <td colspan="2" align="middle">G1</td> 
 <td>-XX:+UseG1GC</td> 
 </tr> 
 </tbody> 
</table>

<table> 
 <thead> 
 <tr> 
 <th align="left"> GC shortname</th> 
 <th align="left"> Generation</th> 
 <th align="left"> Command line parameter</th> 
 <th align="left"> Comment</th> 
 </tr> 
 </thead> 
 <tbody> 
 <tr> 
 <td align="left"> Copy </td> 
 <td align="left"> Young </td> 
 <td align="left"> <code>-XX:+UseSerialGC</code> </td> 
 <td align="left"> The Copying collector </td> 
 </tr> 
 <tr> 
 <td align="left"> MarkSweepCompact </td> 
 <td align="left"> Tenured </td> 
 <td align="left"> <code>-XX:+UseSerialGC</code> </td> 
 <td align="left"> The Mark and Sweep Compactor </td> 
 </tr> 
 <tr> 
 <td align="left"> ConcurrentMarkSweep </td> 
 <td align="left"> Tenured </td> 
 <td align="left"> <code>-XX:+UseConcMarkSweepGC</code> </td> 
 <td align="left"> The Concurrent Mark and Sweep Compactor </td> 
 </tr> 
 <tr> 
 <td align="left"> ParNew </td> 
 <td align="left"> Young </td> 
 <td align="left"> <code>-XX:+UseParNewGC</code> </td> 
 <td align="left"> The parallel Young Generation Collector — can only be used with the Concurrent mark and sweep compactor. </td> 
 </tr> 
 <tr> 
 <td align="left"> PS Scavenge </td> 
 <td align="left"> Young </td> 
 <td align="left"> <code>-XX:+UseParallelGC</code> </td> 
 <td align="left"> The parallel object scavenger </td> 
 </tr> 
 <tr> 
 <td align="left"> PS MarkSweep </td> 
 <td align="left"> Tenured </td> 
 <td align="left"> <code>-XX:+UseParallelGC</code> </td> 
 <td align="left"> The parallel mark and sweep collector </td> 
 </tr> 
 </tbody> 
</table>

具体演示：

使用Serial收集器

-XX:+UseSerialGC

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-XX:+UseParallelGC -XX:-UseParallelOldGC

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-XX:+UseParallelGC -XX:+UseParallelOldGC

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-XX:+UseParNewGC -XX:+UseConcMarkSweepGC

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d0X2JldHRlcg_size_16_color_FFFFFF_t_70 3]

-XX:-UseParNewGC -XX:+UseConcMarkSweepGC

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-XX:+UseG1GC

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