java - What do -XX:-PrintGC and XX:-PrintGCDetails flags do?

Question

I found the JVM flags here. Is there a more detailed explaination of what exactly they do?

Answer 1

Rather on Sun's, use -Xloggc:gc.log to log to a file, -verbose:gc is also a common switch for this.

Also, ensure -XX:+PrintGCDetails and -XX:+PrintGCTimeStamps (note the plus + sign). The timestamp switch is redundant but good to include.