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From fbrisbart <fbrisb...@bestofmedia.com>
Subject Re: (info) lucene first search performance
Date Wed, 13 Nov 2013 12:42:34 GMT
Solr uses the MMap Directory by default.

What you see is surely a filesystem cache.
Once a file is accessed, it's memory mapped.
Restarting solr won't reset it.


On unix, you may reset this cache with 
  echo 3 > /proc/sys/vm/drop_caches


Franck Brisbart


Le mercredi 13 novembre 2013 à 11:58 +0000, Jacky.J.Wang
(mis.cnsh04.Newegg) 41361 a écrit :
>  
> 
> Dear lucene
> 
>  
> 
> In order to test the solr search performance ,I closed all the cache
> solr
> 
> 
> 
> insert into the 10 million data,and find  the first search very
> slowly(700ms),and the secondary search very quick(20ms),I am
> sure no solr cache。
> 
> This problem bothering me for a month,
> 
>  
> 
> Tracing the source code found
> 
>  
> 
> 说明: 说明: cid:image001.png@01CED80C.EF49C740
> 
> Fisrt  invoke readVIntBlock method always very slowly  ,and secondary
> invoke readVIntBlock method is very quick, I don't know what reason is
> this
> 
>  
> 
> Eagerly awaiting your reply, thanks very much!!!
> 
>  
> 
>  
> 
> 



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