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From "Uwe Schindler" <>
Subject RE: Memory issues with Lucene deployment
Date Tue, 25 Sep 2012 19:09:32 GMT

Without a full output of "free -h" we cannot say anything. But the total Linux memory use
should always used by 100% on a good server otherwise it's useless (because full memory includes
cache usage, too). I think, -Xmx may be too less for your Java deployment? We have no information
about the size of your installation.

If "top" reports too much residential memory for the Java VM process then there might be something
wrong, and then we would need "pmap <pid>" of the java process.


Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen

> -----Original Message-----
> From: Paul Taylor []
> Sent: Tuesday, September 25, 2012 8:49 PM
> To: >> "''"
> Subject: Memory issues with Lucene deployment
> Doing Lucene search within a jetty servlet container, the machine has 16gb of
> memory.
> Using 64bit  JVM and Lucene 3.6 and files are memory mapped so I just
> allocate a max of 512mb to jetty itself, understanding that the remaining
> memory can be used to memory map lucene files.
> Monitoring total memory being used at the linux level (assume this is hep
> memory plus memory used for memory mapping) , memory increasingly
> creeps up, and eventually servlet doesnt respond to requests. But dont seem to
> have any errors in the logs/crashes ectera.
> I don't have direct access to the machine this is running on, I know this question
> is a bit vague but I would appreciate some ideas where to investigate next
> thanks Paul
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