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From simon <mtnes...@gmail.com>
Subject Re: Do more fields cause more memory usage?
Date Fri, 30 Sep 2011 14:43:05 GMT
More fields will cause some increase in memory use, but it's hard to
quantify it, and it will also depend on how much usage the queries can make
of Solr's caches, number of simultaneous queries. In general, the number of
query fields has more impact on performance.

 A potentially big memory sink, which will depend on the number of fields in
use, is in the Lucene FieldCache, which is used when result sets are to be
sorted.

If you haven't a;ready done so, take a look at
http://wiki.apache.org/solr/SolrPerformanceFactors which describes a lot of
the factors influencing performance and memory use.

-Simon

On Fri, Sep 30, 2011 at 8:27 AM, Pranav Prakash <pranny@gmail.com> wrote:

> How will the number of fields increase the amount of RAM usage in Solr 3.4?
> I have about 37 different fields because i've made every field for every
> language. I shall be doing dismax search all the time (or slightly less
> than
> all). So, I will have to send my query like
>
> *qf=title_en,title_ar,title_hi,title_fr... and so on.
>
> Will it cause significantly high memory usage than had there been a unified
> field with no langauge specific tokenizers?
>
> *Pranav Prakash*
>
> "temet nosce"
>
> Twitter <http://twitter.com/pranavprakash> | Blog <http://blog.myblive.com>
> |
> Google <http://www.google.com/profiles/pranny>
>

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