Hi Janne,
Here are some GC settings that I'm using with JDK 1.6. I'm not running
JSPWiki with them, but I am running a heavily loaded java app with good
stability.
-Xmn2g
-Xss1m
-XX:+UseConcMarkSweepGC
-XX:+UseParNewGC
-XX:SurvivorRatio=8
-XX:TargetSurvivorRatio=90
-XX:MaxTenuringThreshold=15
-XX:+AggressiveOpts
-XX:+PrintGCDetails
-XX:+PrintGCTimeStamps
-XX:+UseBiasedLocking
HTH,
E
Janne Jalkanen wrote:
Hi ho folks!
I recently upgraded jspwiki.org to run under JDK 1.6.0_3, but
unfortunately that turned out to be a mistake: apparently there are
stability issues with it, since after that, the wiki engine became
unresponsive every six-to-twelve hours. I have a script which pings
jspwiki.org every 20 minutes, and if it's not responding within 30
seconds, it kills and restarts the underlying process.
Yesterday, I went back to 1.5.0_6, and the problems disappeared.
This all is on Ubuntu 6.06, and no, I can't tell you what caused the
unresponsiveness. The heap is pretty full, so this could be a GC
issue, but I ran both with and without -XX:ConcurrentGC, and there was
no difference. jspwiki.org and ecyrd.com which are both running under
the same VM are both pretty heavily loaded (about 1 hit/second on each).
Anybody have any similar experiences?
/Janne
