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https://issues.apache.org/jira/browse/JCS-62?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron Smuts closed JCS-62.
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Resolution: Invalid
JCS does not remove the item from the data file, only from the key list. The
empty spots on the datafile are added to a recycle bin and reused. During an
optimization run, remaining gaps will be removed.
> not able to deallocate the disk memory
> --------------------------------------
>
> Key: JCS-62
> URL: https://issues.apache.org/jira/browse/JCS-62
> Project: JCS
> Issue Type: Bug
> Components: Indexed Disk Cache
> Affects Versions: jcs-1.3
> Environment: Windows Xp,RAD,java5,AMD processor
> Reporter: rushi
> Assignee: Aaron Smuts
> Fix For: jcs-1.3
>
>
> I have configured the JCS to store the cached objects in disk using below
> properties.
>
> jcs.region.report.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
> jcs.region.report.cacheattributes.MaxObjects=2
>
> jcs.region.report.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache
> jcs.region.report.cacheattributes.UseMemoryShrinker=true
> jcs.region.report.elementattributes.MaxLifeSeconds=60
> jcs.region.testCache1.cacheattributes.MaxMemoryIdleTimeSeconds=60
> jcs.region.report.cacheattributes.ShrinkerIntervalSeconds=10
> jcs.region.report.cacheattributes.MaxSpoolPerRun=300
>
> jcs.region.report.elementattributes=org.apache.jcs.engine.ElementAttributes
> jcs.region.report.elementattributes.IsEternal=false
>
>
> 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=c:/tempcache
> jcs.auxiliary.DC.attributes.ClearDiskOnStartup=true
> jcs.auxiliary.DC.attributes.maxKeySize=100000
> I tried to cache 100 objects. JCS cached the first 2 objects in the java
> memory as I specified jcs.region.report.cacheattributes.MaxObjects=2. The
> remaining objects gets cached in the disk file in c:/tempcache/report.data.
> After 60 (MaxLifeSeconds) seconds the objects stored in java memory got
> deleted. I am able to identify this by looking at the log file, it has log
> message like "Exceeded maxLifeSeconds: key name".
> I could not see above log message for the cached objects in disk after 60
> seconds. I believe that objects stored on disk never get deleted but the
> surprise thing is if i try to access the cached object in disk after 60
> seconds, it is returning null, that means the object has expired. But JCS is
> not deallocating the memory occupied by that expired object.
> Is it possible to deallocate that memory occupied when the object gets
> expired? I thought of asking this as I need to cache lot of data. If I am not
> able to deallocate the memory , the file size gets increased and might get
> exception.
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