Re: Solr4 performance

[Shalin Shekhar Mangar <sh...@gmail.com>]

No, Solr doesn't load the entire index in memory. I think you'll find
Uwe's blog most helpful on this matter:

http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html

On Thu, Feb 13, 2014 at 12:27 AM, Joshi, Shital <Sh...@gs.com> wrote:
> Does Solr4 load entire index in Memory mapped file? What is the eviction policy of this memory mapped file? Can we control it?
>
> _____________________________________________
> From: Joshi, Shital [Tech]
> Sent: Wednesday, February 05, 2014 12:00 PM
> To: 'solr-user@lucene.apache.org'
> Subject: Solr4 performance
>
>
> Hi,
>
> We have SolrCloud cluster (5 shards and 2 replicas) on 10 dynamic compute boxes (cloud). We're using local disk (/local/data) to store solr index files. All hosts have 60GB ram and Solr4 JVM are running with max 30GB heap size. So far we have 470 million documents. We are using custom sharding and all shards have ~9-10 million documents. We have a GUI sending queries to this cloud and GUI has 30 seconds of timeout.
>
> Lately we're getting many timeouts on GUI and upon checking we found that all timeouts are happening on 2 hosts. The admin GUI for one of the hosts show 96% of physical memory but the other host looks perfectly good. Both hosts are for different shards. Would increasing ram of these two hosts make these timeouts go away? What else we can check?
>
> Many Thanks!
>
>



-- 
Regards,
Shalin Shekhar Mangar.