resin之jvm优化「建议收藏」

大家好，又见面了，我是你们的朋友全栈君。

经过几天的测试，系统终于较以前有所稳定了，特把优化后的参数发布出来，供朋友们一起讨论

我的服务器配置：至强双CPU2.2G，ECC内存4G，硬盘70G，操作系统：AS4 jdk1.5.0_02

没优化之前，服务器经常抛出内存溢出，物理内存居高不下，还经常抛出keepalive 超过最大值500。服务器一天重启两三次，客户抱怨声不断。

<jvm-arg>-Xms1024M</jvm-arg> <jvm-arg>-Xmx1024M</jvm-arg> <jvm-arg>-Xmn256M</jvm-arg> <jvm-arg>-Xss1M</jvm-arg> <jvm-arg>-XX:PermSize=256M</jvm-arg> <jvm-arg>-XX:MaxPermSize=256M</jvm-arg> <jvm-arg>-XX:NewRatio=4</jvm-arg> <jvm-arg>-XX:SurvivorRatio=4</jvm-arg> <jvm-arg>-XX:MaxTenuringThreshold=7</jvm-arg> <jvm-arg>-XX:GCTimeRatio=10</jvm-arg> <jvm-arg>-XX: UseConcMarkSweepGC</jvm-arg> <jvm-arg>-XX: UseCMSCompactAtFullCollection</jvm-arg> <jvm-arg>-XX:CMSFullGCsBeforeCompaction=5</jvm-arg> <jvm-arg>-XX:CMSInitiatingOccupancyFraction=70</jvm-arg> <jvm-arg>-XX:SoftRefLRUPolicyMSPerMB=0</jvm-arg> <jvm-arg>-XX: PrintClassHistogram</jvm-arg> <jvm-arg>-XX: PrintGCDetails</jvm-arg> <jvm-arg>-XX: PrintGCTimeStamps</jvm-arg> <jvm-arg>-XX: PrintGCApplicationConcurrentTime</jvm-arg> <jvm-arg>-XX: PrintGCApplicationStoppedTime</jvm-arg> <jvm-arg>-Xloggc:log/gc.log</jvm-arg>

优化以后，已经稳定运行四天了，物理空闲内存大概1G左右，不知道以上设置还有没有不合理的地方，如果有，请指教。

经过一段时间，又做了如下改动

<jvm-arg>-server</jvm-arg> <jvm-arg>-Xms1524M</jvm-arg>

<jvm-arg>-Xmx1524M</jvm-arg>

<jvm-arg>-Xmn512M</jvm-arg> <jvm-arg>-Xss1M</jvm-arg>

<jvm-arg>-XX:PermSize=256M</jvm-arg>

<jvm-arg>-XX:MaxPermSize=256M</jvm-arg>

<jvm-arg>-XX:SurvivorRatio=8</jvm-arg>

<jvm-arg>-XX:MaxTenuringThreshold=7</jvm-arg>

<jvm-arg>-XX:GCTimeRatio=19</jvm-arg>

<jvm-arg>-XX: UseParNewGC</jvm-arg>

<jvm-arg>-XX: UseConcMarkSweepGC</jvm-arg> <jvm-arg>-XX: CMSPermGenSweepingEnabled</jvm-arg> <jvm-arg>-XX: CMSClassUnloadingEnabled</jvm-arg>

<jvm-arg>-XX: UseCMSCompactAtFullCollection</jvm-arg>

<jvm-arg>-XX:CMSFullGCsBeforeCompaction=2</jvm-arg> <jvm-arg>-XX:-CMSParallelRemarkEnabled</jvm-arg> <jvm-arg>-XX: DisableExplicitGC</jvm-arg>

<jvm-arg>-XX:CMSInitiatingOccupancyFraction=70</jvm-arg>

<jvm-arg>-XX:SoftRefLRUPolicyMSPerMB=0</jvm-arg>

<jvm-arg>-XX: PrintClassHistogram</jvm-arg>

<jvm-arg>-XX: PrintGCDetails</jvm-arg>

<jvm-arg>-XX: PrintGCTimeStamps</jvm-arg>

<jvm-arg>-XX: PrintGCApplicationConcurrentTime</jvm-arg>

<jvm-arg>-XX: PrintGCApplicationStoppedTime</jvm-arg>

<jvm-arg>-Xloggc:log/gc.log</jvm-arg>

resin已经换成resin-pro-3.1.8版本了，现在系统运行越来越稳定了，高兴！

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