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GC Logging Flags in Java 8 and Earlier

• -XX:+PrintGC

• -XX:+PrintGCDetails

• -XX:+PrintGCDateStamps and -XX:+PrintGCTimeStamps

• -Xloggc

java -cp $CLASSPATH -Xloggc mypackage.MainClass # stdout
java -cp $CLASSPATH -Xloggc:/tmp/gc.log mypackage.MainClass

GC Logging Flags in Java 9 and Later

• -Xlog

java -Xlog:logging=debug -version
java -cp $CLASSPATH -Xlog:gc*=debug:file=/tmp/gc.log mypackage.MainClass
java -cp $CLASSPATH -Xlog:gc*=debug:stdout -Xlog:gc*=debug:file=/tmp/gc.log mypackage.MainClass

References

• https://www.baeldung.com/java-gc-logging-to-file

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