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Memory question
 

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chris.bamford at talktalk

May 15, 2012, 7:47 AM


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Memory question

Hi

Can anyone tell me what happens to the memory when Lucene opens an index? Is it loaded into the JVM's heap or is it mapped into virtual memory outside of it?
I am running on Linux and if I use pmap on the PID of my JVM, I can see lots of entries for index cfs files.

Does this mean that indexes are mapped into non-heap memory? If so, how can I monitor the space my process is using if I cache open IndexSearchers?

The details are:

Sun 64-bit JVM on Linux.
Lucene 3.6 running in 2.3 compatibility mode (as we are in the in the process of a migration to 3.6)

Thanks,

- Chris

Subject User Time
Memory question chris.bamford at talktalk May 15, 2012, 7:47 AM
    RE: Memory question LFechner at hubwoo May 15, 2012, 7:51 AM
    Re: Memory question ian.lea at gmail May 15, 2012, 8:19 AM
    RE: Memory question uwe at thetaphi May 15, 2012, 10:10 AM
        Re: RE: Memory question chris.bamford at talktalk May 15, 2012, 12:38 PM
    Re: Memory question john.nader at cengage May 15, 2012, 1:12 PM
        Re: Memory question chris.bamford at talktalk May 15, 2012, 2:38 PM
        Re: Memory question sean.bridges at gmail May 15, 2012, 10:00 PM
    RE: Memory question LFechner at hubwoo May 15, 2012, 3:32 PM
    Re: Memory question lucene_list at iconparc May 16, 2012, 12:11 AM
    Re: Memory question john.nader at cengage May 16, 2012, 8:27 AM
        Re: Memory question chris.bamford at talktalk May 16, 2012, 9:00 AM
        Re: Memory question chris at bammers May 21, 2012, 9:49 AM

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