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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Poor performance on distributed search
Date Fri, 16 Dec 2011 20:22:22 GMT
OK, so your speed differences are pretty much dependent upon whether you specify
rows=2000 or rows=10, right? Why do you need 2,000 rows?

Or is the root question why there's such a difference when you specify
qt=requestShards? In which case I'm curious to see that request
handler definition...

Best
Erick

On Fri, Dec 16, 2011 at 1:38 PM, ku3ia <demesg@gmail.com> wrote:
> Hi, Erick, thanks for your reply
>
> Yeah, you are right - document cache is default, but I tried to decrease and
> increase values but I didn't get the desired result.
>
> I tried the tests. Here are results:
>
>>>1> try with "&rows=10"
> successfully started at 19:48:34
> Queries interval is: 10 queries per minute
> http://127.0.0.1:8080/solr/shard1/select/?ident=true&q=(gulping)&rows=10&start=0&fl=*,score&qt=requestShards
> ...
> http://127.0.0.1:8080/solr/shard1/select/?ident=true&q=(tabors)&rows=10&start=0&fl=*,score&qt=requestShards
> utility successfully stopped at 19:53:33
> Elapsed time: 299 secs
> --- solr ---
> Queries processed: 50
> Queries cancelled: 0
> Average QTime is: 764 ms
> Average RTime is: 0.68 sec(s)
> Size of data-dir is: 235784 bytes
>
>>>2> try with "&fl=id" assuming "id" is your <uniqueKey>
> successfully started at 19:56:23
> Queries interval is: 10 queries per minute
> http://127.0.0.1:8080/solr/shard1/select/?ident=true&q=(psyche's)&rows=2000&start=0&fl=RecordID&qt=requestShards
> ...
> http://127.0.0.1:8080/solr/shard1/select/?ident=true&q=(betook)&rows=2000&start=0&fl=RecordID&qt=requestShards
> utility successfully stopped at 20:01:24
> Elapsed time: 301 secs
> --- solr ---
> Queries processed: 15
> Queries cancelled: 35
> Average QTime is: 52775.7 ms
> Average RTime is: 53.2667 sec(s)
> Size of data-dir is: 212978 bytes
>
> In first test disk usage by nmon: ~30-40% and in the second - 100%. Drive
> read speed starting from 3-5 MB/s and falls to 500-700 KB/s in both tests.
>
> Have you any ideas?
>
> --
> View this message in context: http://lucene.472066.n3.nabble.com/Poor-performance-on-distributed-search-tp3590028p3592364.html
> Sent from the Solr - User mailing list archive at Nabble.com.

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