java虚拟机优化--gc日志

加入
wrapper.java.additional.5=-XX:+PrintGC
wrapper.java.additional.6=-XX:+PrintGCDetails
#wrapper.java.additional.7=-XX:+PrintGC:PrintGCTimeStamps
wrapper.java.additional.7=-Xloggc:gc.log
wrapper.java.additional.8=-XX:+PrintGCApplicationStoppedTime
wrapper.java.additional.9=-Xmn1200m
wrapper.java.additional.10=-XX:+UseConcMarkSweepGC
wrapper.java.additional.11=-XX:+UseParNewGC
wrapper.java.additional.12=-XX:+CMSParallelRemarkEnabled
wrapper.java.additional.13=-XX:+UseCMSCompactAtFullCollection

在tomcat的bin目录下打印出gc日志

查看年轻代 年老代的非配
wrapper.java.additional.9=-Xmn1200m
参数就是调整年轻代的参数，一般是总jvm内存的40%