JDK9及之后的日志与之前的对比

官方文档 : https://docs.oracle.com/javase/9/tools/java.htm#JSWOR624

image-20200522141423612

图片来源: https://blog.gceasy.io/2017/10/17/43-gc-logging-flags-removed-in-java-9/

常用例子

-Xlog:gc*,gc+ref=debug,gc+heap=debug,gc+age=trace,gc+ergo*=trace:file=/tmp/idea-gc-%p-%t.log:tags,uptime,time,level:filecount=10,filesize=50m