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From Toke Eskildsen>
Subject Re: Facing Solr performance during query search
Date Thu, 22 Aug 2013 12:16:07 GMT
On Wed, 2013-08-21 at 10:09 +0200, sivaprasad wrote:
> The slave will poll for every 1hr. 

And are there normally changes?

> We have configured ~2000 facets and the machine configuration is given
> below.

I assume that you only request a subset of those facets at a time.

How much RAM does your machine have? 
How large is your index in GB?
How many documents do you have in your index?

As you are not explicitly warming your facets and since you have a lot
of them, my guess is that you're performing initializing facet calls all
the time. If the slave only has 32GB of RAM (and thus only about 10GB
for disk cache) and if your index is substantially larger than that, the
initialization will require a lot of non-cached disk access.

Try disabling the slave polling, then send 1000 queries and then re-send
the exact same 1000 queries. Are the response times satisfactory the
second time? If so, you should consider warming your facets and/or try
to come up with a solution where you don't have so many of them.

- Toke Eskildsen, State and University Library, Denmark

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