CMS collection keep working during holiday

Tony Printezis Antonios.Printezis at sun.com
Wed Oct 8 14:24:10 UTC 2008


jmap -histo too

Tony

kirk wrote:
> Ken-- at newsgroupstats.hk wrote:
>> Follow up to the jconsole above. This gif is captured today. You can 
>> see the
>> first CMS after a FULL GC is working. The 2nd one is working too but the
>> memory free from 2nd generation is much less than the first CMS. The 
>> memory
>> free by 3rd CMS is further decreased.
>>
>> The 5th CMS cannot free enough memory to make occanpcy in old-gen to 
>> less
>> than 70%. So, continue non-stopping CMS happen again until a Full GC
>> (triggered by Concurrent Mode Failure).
>>
>> http://www.nabble.com/file/p19872463/jconsole_20081008.jpg
>>
>>
>>
>>
>>
>>   
> If GC is failing to recover memory, you either have a memory leak or 
> long loitering objects. I'd suggest visualvm or netbeans memory 
> profiling using the generations option to find out what objects are 
> surviving
>
> Regards,
> Kirk

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