[jboss-user] [JBossCache] - Re: JBC 2 performance

[manik.surtani@jboss.com]

"aditsu" wrote : Hm.. I'm not sure how it's related, but it sounds very good.

I don't bother protecting/synchronizing the maps in a node when accessed via the XXDirect() calls as I assume that any locking happens on a higher level (see javadocs on NodeSPI).  So clearly this higher-level sync wasn't working and hence the concurrent modification exceptions.  And true enough, a bug in the PessimisticLockInterceptor was only acquiring read locks for remove(Fqn, Key) calls rather than write locks.

"aditsu" wrote : 
  | I updated again from CVS; it seems to work now and doesn't do MapCopy anymore. The performance is still not really great, but it may not be JBC's fault. I'll keep profiling.
  | 

Performance not great, in relation to 1.4.1?  Or in an absolute sense?  What's your setup, how is your cluster configured, do you use cache loaders, eviction?


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