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0 Replies Latest reply: Jul 23, 2008 2:44 PM by 843829 RSS

gc frequency increses

843829 Newbie
Currently Being Moderated
I set the flag -Xmax=12g for my app. At initial launch, garbage collection happens when
young generation reaches around 3G, gc time takes around 0.5 seconds, the
interval between gc is around 5minutes. After running for a few days, gc happens much
more often than before, now every few seconds, there is a gc happening. The
good thing is that it took very short-- 0.05 seconds. I am just curious
about why JVM kicks off gc that often.

Can anyone shed some light on it?

beginning:
97.788: [GC [PSYoungGen: 3036448K->643872K(3308800K)] 4194717K->1855973K(
7503104K), 0.5798960 secs]


After a week:
622400.501: [GC [PSYoungGen: 69152K->960K(69120K)] 6433088K->6365104K(
8457728K), 0.0405890 secs]