Perplexing GC Time Growth
Y Srinivas Ramakrishna
Y.S.Ramakrishna at Sun.COM
Fri Jan 4 10:21:38 PST 2008
Hi Paul --
[I am posting my response to the *-use list where the original discussion started.]
As the scavenge time plots which i posted earlier indicated, the scavenges increase in a
linear fashion and are not affected by remarks.
As I also indicated to Jason in a late follow-up yesterday, I had screwed
up in the specification for class unloading which, pre-6u4, need two flags
to be effective: XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled.
Let us see what Jason says about the effect of those two flags.
----- Original Message -----
From: "Ciciora, Paul" <Ciciora at cboe.com>
Date: Friday, January 4, 2008 7:30 am
Subject: Perplexing GC Time Growth
To: hotspot-gc-dev at openjdk.java.net
> If you don't mind me asking, what do the times look like after a remark
> cycle? Also have you run with PrintTenuringDistribution? It's a nice
> way to make sure you have the optimal number of slots.
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