Hi,
You may be adding to the cache faster than anything can be garbage
collected or spooled to disk. Use
-XX:+PrintGCDetails \
-XX:+PrintGCTimeStamps \
-Xloggc:/tmp/logs/gc.log \
-XX:-TraceClassUnloading
to help trace the gc.
Also, if you need to tune the gc you can try these setting:
-XX:+UseConcMarkSweepGC \
-XX:+CMSIncrementalMode \
-XX:+CMSPermGenSweepingEnabled \
-XX:+CMSClassUnloadingEnabled \
-XX:-UseGCOverheadLimit"
On 09/04/2008, Joshua Szmajda <[EMAIL PROTECTED]> wrote:
> Hey all,
>
> I've got a JCS remote cache server running on a machine and every now and
> then it will spiral out of control and lock the machine. I have no idea yet
> what's causing this, I've just put some extra measures in place to capture
> the logs from when it happens. My solution at this point is a cron job that
> checks now and then for excessive cpu usage and restarts the cache server.
> I'd like to be able to not worry about it, though :).
>
> Any suggestions?
>
> Thanks!
> -Josh
>
> P.S. it's running on ubuntu-server (kernel 2.6.22-14-server).
> I have up to 16 remote listeners connecting to any given region. (probably
> 20 application instances in all).
> Puts grow at a rate of about 400 per second.
> I pass these options to java: "-Xms128m -Xmx2000m"
> And here's my simple remote.cache.ccf:
>
> registry.host=localhost
> registry.port=10021
> remote.cluster.LocalClusterConsistency=true
> remote.cluster.AllowClusterGet=true
>
> jcs.default=DC
> jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
> jcs.default.cacheattributes.MaxObjects=10000
> jcs.default.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache
> jcs.default.cacheattributes.UseMemoryShrinker=true
> jcs.default.cacheattributes.MaxMemoryIdleTimeSeconds=3600
> jcs.default.cacheattributes.ShrinkerIntervalSeconds=60
> jcs.default.elementattributes=org.apache.jcs.engine.ElementAttributes
> jcs.default.elementattributes.IsEternal=false
> jcs.default.elementattributes.MaxLifeSeconds=86400
> jcs.default.elementattributes.IdleTime=7200
> jcs.default.elementattributes.IsSpool=true
> jcs.default.elementattributes.IsRemote=true
> jcs.default.elementattributes.IsLateral=true
>
> jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheFactory
> jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheAttributes
> jcs.auxiliary.DC.attributes.DiskPath=/var/tmp/jcsServer
> jcs.auxiliary.DC.attributes.MaxPurgatorySize=10000
> jcs.auxiliary.DC.attributes.MaxKeySize=100000
> jcs.auxiliary.DC.attributes.OptimizeAtRemoveCount=300000
> jcs.auxiliary.DC.attributes.OptimizeOnShutdown=true
> jcs.auxiliary.DC.attributes.MaxRecycleBinSize=7500
>
>
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