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From Gora Mohanty <g...@srijan.in>
Subject Re: improving search response time
Date Wed, 18 Aug 2010 14:28:26 GMT
On Wed, 18 Aug 2010 05:18:34 -0700 (PDT)
Muneeb Ali <muneebali1@hotmail.com> wrote:

> 
> Hi All,
> 
> I need some guidance over improving search response time for our
> catalog search. 
[...]
> I would appreciate if anyone with similar background could shed
> some light on upgrading hardware in our situation. Or if any
> other configuration tweak that is not on the above list. 
[...]

It would probably help if you could post some benchmarks of what
your current search response times are (from the Solr back-end,
and not from any front-end in front of it), and what your desired
response times are. You could use Apache bench, and or JMeter for
this.

As a data point, while our index size/no. of documents is smaller
(~40GB/3.6 million documents), we are seeing a mean response
time/request of ~120ms for numeric fields, at 50 simulated
simultaneous connections, with a single Solr server having 8 ~2GHz
cores, and 12GB RAM. This measure however, *is* influenced by the
effects of Solr caching. Solr is close to a factor of 10 faster
than our front-end, even though that is pulling almost everything
from Solr. So, we are happy on that front :-)

Regards,
Gora

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