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From Rahul R <rahul.s...@gmail.com>
Subject Re: JVM Heap utilization & Memory leaks with Solr
Date Wed, 19 Aug 2009 10:18:52 GMT
Fuad,
We have around 5 million documents and around 3700 fields. All documents
will not have values for all the fields.... JRockit is not approved for use
within my organization. But thanks for the info anyway.

Regards
Rahul

On Tue, Aug 18, 2009 at 9:41 AM, Funtick <fuad@efendi.ca> wrote:

>
> BTW, you should really prefer JRockit which really rocks!!!
>
> "Mission Control" has necessary toolongs; and JRockit produces _nice_
> exception stacktrace (explaining almost everything) in case of even OOM
> which SUN JVN still fails to produce.
>
>
> SolrServlet still catches "Throwable":
>
>    } catch (Throwable e) {
>      SolrException.log(log,e);
>      sendErr(500, SolrException.toStr(e), request, response);
>    } finally {
>
>
>
>
>
> Rahul R wrote:
> >
> > Otis,
> > Thank you for your response. I know there are a few variables here but
> the
> > difference in memory utilization with and without shards somehow leads me
> > to
> > believe that the leak could be within Solr.
> >
> > I tried using a profiling tool - Yourkit. The trial version was free for
> > 15
> > days. But I couldn't find anything of significance.
> >
> > Regards
> > Rahul
> >
> >
> > On Tue, Aug 4, 2009 at 7:35 PM, Otis Gospodnetic
> > <otis_gospodnetic@yahoo.com
> >> wrote:
> >
> >> Hi Rahul,
> >>
> >> A) There are no known (to me) memory leaks.
> >> I think there are too many variables for a person to tell you what
> >> exactly
> >> is happening, plus you are dealing with the JVM here. :)
> >>
> >> Try jmap -histo:live PID-HERE | less and see what's using your memory.
> >>
> >> Otis
> >> --
> >> Sematext is hiring -- http://sematext.com/about/jobs.html?mls
> >> Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR
> >>
> >>
> >>
> >> ----- Original Message ----
> >> > From: Rahul R <rahul.solr@gmail.com>
> >> > To: solr-user@lucene.apache.org
> >> > Sent: Tuesday, August 4, 2009 1:09:06 AM
> >> > Subject: JVM Heap utilization & Memory leaks with Solr
> >> >
> >> > I am trying to track memory utilization with my Application that uses
> >> Solr.
> >> > Details of the setup :
> >> > -3rd party Software : Solaris 10, Weblogic 10, jdk_150_14, Solr 1.3.0
> >> > - Hardware : 12 CPU, 24 GB RAM
> >> >
> >> > For testing during PSR I am using a smaller subset of the actual data
> >> that I
> >> > want to work with. Details of this smaller sub-set :
> >> > - 5 million records, 4.5 GB index size
> >> >
> >> > Observations during PSR:
> >> > A) I have allocated 3.2 GB for the JVM(s) that I used. After all users
> >> > logout and doing a force GC, only 60 % of the heap is reclaimed. As
> >> part
> >> of
> >> > the logout process I am invalidating the HttpSession and doing a
> >> close()
> >> on
> >> > CoreContainer. From my application's side, I don't believe I am
> holding
> >> on
> >> > to any resource. I wanted to know if there are known issues
> surrounding
> >> > memory leaks with Solr ?
> >> > B) To further test this, I tried deploying with shards. 3.2 GB was
> >> allocated
> >> > to each JVM. All JVMs had 96 % free heap space after start up. I got
> >> varying
> >> > results with this.
> >> > Case 1 : Used 6 weblogic domains. My application was deployed one 1
> >> domain.
> >> > I split the 5 million index into 5 parts of 1 million each and used
> >> them
> >> as
> >> > shards. After multiple users used the system and doing a force GC,
> >> around
> >> 94
> >> > - 96 % of heap was reclaimed in all the JVMs.
> >> > Case 2: Used 2 weblogic domains. My application was deployed on 1
> >> domain.
> >> On
> >> > the other, I deployed the entire 5 million part index as one shard.
> >> After
> >> > multiple users used the system and doing a gorce GC, around 76 % of
> the
> >> heap
> >> > was reclaimed in the shard JVM. And 96 % was reclaimed in the JVM
> where
> >> my
> >> > application was running. This result further convinces me that my
> >> > application can be absolved of holding on to memory resources.
> >> >
> >> > I am not sure how to interpret these results ? For searching, I am
> >> using
> >> > Without Shards : EmbeddedSolrServer
> >> > With Shards :CommonsHttpSolrServer
> >> > In terms of Solr objects this is what differs in my code between
> normal
> >> > search and shards search (distributed search)
> >> >
> >> > After looking at Case 1, I thought that the CommonsHttpSolrServer was
> >> more
> >> > memory efficient but Case 2 proved me wrong. Or could there still be
> >> memory
> >> > leaks in my application ? Any thoughts, suggestions would be welcome.
> >> >
> >> > Regards
> >> > Rahul
> >>
> >>
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/JVM-Heap-utilization---Memory-leaks-with-Solr-tp24802380p25018165.html
>  Sent from the Solr - User mailing list archive at Nabble.com.
>
>

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