You'll want to check to see if there are any static warming queries being
run as well.

How often are you committing and opening a new searcher? Are you using
autoCommits or explicitly committing?

Joel Bernstein
http://joelsolr.blogspot.com/

On Wed, Aug 12, 2015 at 3:57 AM, Adrian Liew <adrian.l...@avanade.com>
wrote:

> Additionally,
>
> I realized that my autowarmCount is set to zero for the following Cache
> entries except perSegFilter:
>
>     <filterCache class="solr.FastLRUCache"
>                  size="512"
>                  initialSize="512"
>                  autowarmCount="0"/>
>
>     <!-- Query Result Cache
>
>         Caches results of searches - ordered lists of document ids
>         (DocList) based on a query, a sort, and the range of documents
> requested.
>         Additional supported parameter by LRUCache:
>            maxRamMB - the maximum amount of RAM (in MB) that this cache is
> allowed
>                       to occupy
>      -->
>     <queryResultCache class="solr.LRUCache"
>                      size="512"
>                      initialSize="512"
>                      autowarmCount="0"/>
>
>     <!-- Document Cache
>
>          Caches Lucene Document objects (the stored fields for each
>          document).  Since Lucene internal document ids are transient,
>          this cache will not be autowarmed.
>       -->
>     <documentCache class="solr.LRUCache"
>                    size="512"
>                    initialSize="512"
>                    autowarmCount="0"/>
>
>     <!-- custom cache currently used by block join -->
>     <cache name="perSegFilter"
>       class="solr.search.LRUCache"
>       size="10"
>       initialSize="0"
>       autowarmCount="10"
>       regenerator="solr.NoOpRegenerator" />
>
>
> The link,
> https://wiki.apache.org/solr/FAQ#What_does_.22PERFORMANCE_WARNING:_Overlapping_onDeckSearchers.3DX.22_mean_in_my_logs.3F
> did suggest to reduce the autowarmCount or reduce warm up cache activity
> (which I am not sure where to begin doing this).
>
> I suspect autowarmCount is not very large as the above.
>
> Let me know what you think.
>
> Best regards,
> Adrian Liew
>
>
> -----Original Message-----
> From: Adrian Liew [mailto:adrian.l...@avanade.com]
> Sent: Wednesday, August 12, 2015 3:32 PM
> To: solr-user@lucene.apache.org
> Subject: RE: Performance warning overlapping onDeckSearchers
>
> Thanks Shawn. Having said that increasing maxWarmingSearchers is usually
> wrong to solve this, are there any implications if we set
> maxWarmingSearchers to zero to resolve this problem?
>
> Or do you think there are some other settings that are worthwhile tuning
> to cater to the above?
>
> Best regards,
> Adrian
>
> -----Original Message-----
> From: Shawn Heisey [mailto:apa...@elyograg.org]
> Sent: Tuesday, August 11, 2015 11:02 PM
> To: solr-user@lucene.apache.org
> Subject: Re: Performance warning overlapping onDeckSearchers
>
> On 8/11/2015 3:02 AM, Adrian Liew wrote:
> > Has anyone come across this issue, [some_index] PERFORMANCE WARNING:
> Overlapping onDeckSearchers=2?
> >
> > I am currently using Solr v5.2.1.
> >
> > What does this mean? Does this raise red flags?
> >
> > I am currently encountering an issue whereby my Sitecore system is
> unable to update the index appropriately. I am not sure if this is linked
> to the warnings above.
>
>
> https://wiki.apache.org/solr/FAQ#What_does_.22PERFORMANCE_WARNING:_Overlapping_onDeckSearchers.3DX.22_mean_in_my_logs.3F
>
> What the wiki page doesn't explicitly state is that increasing
> maxWarmingSearchers is usually the wrong way to solve this, because that
> can actually make the problem *worse*.  It is implied by the things the
> page DOES say, but it is not stated.
>
> Thanks,
> Shawn
>
>

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