[infinispan-dev] Eviction thread and purging expired entries

[Mircea Markus]

Wrong again. Actually the point still stands: no use in calling cacheStore.purge if expiration is not used, on the contrary. 
That would add an unnecessary burden on the store and potentially add a lot of contention: e.g. FileCacheStore would RL the whole store, time in which the eviction thread is not able to write(passivate).

On 21 Jul 2010, at 16:21, Mircea Markus wrote:

> Ignore me. Actually this is already there and enabled by default, at cache store level (purgeSynchronously = false).
> On 21 Jul 2010, at 15:46, Vladimir Blagojevic wrote:
> 
>> Yes this needs to be addressed. What I would certainly argue against is another configuration option for purging cache store. Try explaining that to average user :) 
>> 
>> Why can't he allocate more memory to target the plateau of projected memory usage? Or is this some temporary memory spike in his use case that can not be avoided.
>> 
>> 
>> On 2010-07-21, at 9:24 AM, Mircea Markus wrote:
>> 
>>> Hi,
>>> 
>>> Eviction thread does two things right now:
>>> - evict stuff from DataContainer
>>> - purge entries from a CacheStore
>>> 
>>> CacheStore.purge might slow down eviction as it is generally an expensive operation. It might not even be needed, if the users don't use expiration. 
>>> What about: 
>>> a) making EvictionThread.purgeCacheStore configurable. 
>>> or/and
>>> b) use another thread for purging the store. 
>>> 
>>> This doesn't came out of the blue, there's a user that has eviction+cache store configured with eviction thread wakeup set to 1 sec - he still gets OOM.
>>> 
>>> Wdyt?
>>> 
>>> Cheers,
>>> Mircea
>>> _______________________________________________
>>> infinispan-dev mailing list
>>> infinispan-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>> 
>> --
>> Vladimir Blagojevic
>> JBoss Clustering Team
>> JBoss, by Red Hat
>> 
>> 
>> 
>> 
>> 
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>