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From Christoph Kaser <lucene_l...@iconparc.de>
Subject Re: search performance
Date Tue, 03 Jun 2014 06:39:04 GMT
Can you take thread stacktraces (repeatedly) during those 5 minute 
searches? That might give you (or someone on the mailing list) a clue 
where all that time is spent.
You could try using jstack for that: 
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jstack.html

Regards
Christoph

Am 03.06.2014 08:17, schrieb Jamie:
> Toke
>
> Thanks for the comment.
>
> Unfortunately, in this instance, it is a live production system, so we 
> cannot conduct experiments. The number is definitely accurate.
>
> We have many different systems with a similar load that observe the 
> same performance issue. To my knowledge, the Lucene integration code 
> is fairly well optimized.
>
> I've requested access to the indexes so that we can perform further 
> testing.
>
> Regards
>
> Jamie
>
> On 2014/06/03, 8:09 AM, Toke Eskildsen wrote:
>> On Mon, 2014-06-02 at 08:51 +0200, Jamie wrote:
>>
>> [200GB, 150M documents]
>>
>>> With NRT enabled, search speed is roughly 5 minutes on average.
>>> The server resources are:
>>> 2x6 Core Intel CPU, 128GB, 2 SSD for index and RAID 0, with Linux.
>> 5 minutes is extremely long. Is that really the right number? I do not
>> see a hardware upgrade changing that with the fine machine you're using.
>>
>> What is your search speed if you disable continuous updates?
>>
>> When you restart the searcher, how long does the first search take?
>>
>>
>> - Toke Eskildsen, State and University Library, Denmark
>>
>>
>>
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