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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