[jboss-dev-forums] [Design of JBossCache] - Re: Lock striping broken for Second Level Cache use case

[jason.greene@jboss.com]

"manik.surtani at jboss.com" wrote : "bstansberry at jboss.com" wrote : PerElementLockContainer.locks is using the default CHM c'tor which means 16 segments. That's low since this will be a very write-heavy map.
  | 
  | Good point.  Updating this to use the concurrencyLevel value, which defaults to 500.

You might want to use something a lot less than that. 500 is a small value, and that creates 500 hashmaps + locks. You only need a few per cpu.

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