jvm优化

来源:互联网 发布:李炎恢javascript源码 编辑:程序博客网 时间:2024/03/29 02:37

一、用JMeter创建100个线程对指定url进行压力测试。初始状态,吞吐量为8.7/s



二、参考java程序性能优化,在tomcat的catalina.bat新增配置。重新设置堆大小和永久区大小、禁用显示GC、去掉类校验、使用并行回收收集器代替串行收集器、使用CMS回收器、设置较大的survivior区,努力将对象预留在新生代、将CMS的Full GC触发的阈值设置为78%,即当老年代使用到78%时,才触发Full GC。吞吐率提高到9.4/s

set CATALINA_OPTS=%CATALINA_OPTS% "-XX:+PrintGCDetails"set CATALINA_OPTS=%CATALINA_OPTS% "-Xmx512M"set CATALINA_OPTS=%CATALINA_OPTS% "-Xms512M"set CATALINA_OPTS=%CATALINA_OPTS% "-XX:PermSize=64M"set CATALINA_OPTS=%CATALINA_OPTS% "-XX:MaxPermSize=64M"set CATALINA_OPTS=%CATALINA_OPTS% "-XX:+DisableExplicitGC"set CATALINA_OPTS=%CATALINA_OPTS% "-Xverify:none"set CATALINA_OPTS=%CATALINA_OPTS% "-XX:+UseConcMarkSweepGC"set CATALINA_OPTS=%CATALINA_OPTS% "-XX:ParallelCMSThreads=8"set CATALINA_OPTS=%CATALINA_OPTS% -XX:+UseCMSCompactAtFullCollectionset CATALINA_OPTS=%CATALINA_OPTS% -XX:CMSFullGCsBeforeCompaction=0set CATALINA_OPTS=%CATALINA_OPTS% -XX:CMSInitiatingOccupancyFraction=78set CATALINA_OPTS=%CATALINA_OPTS% -XX:SoftRefLRUPolicyMSPerMB=0set CATALINA_OPTS=%CATALINA_OPTS% -XX:+CMSParallelRemarkEnabledset CATALINA_OPTS=%CATALINA_OPTS% -XX:SurvivorRatio=1set CATALINA_OPTS=%CATALINA_OPTS% -XX:+UseParNewGC





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