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From Ian Lea <ian....@gmail.com>
Subject Re: Doc Caching
Date Tue, 20 Apr 2010 09:44:32 GMT
Generally best to let the OS do it.  Having plenty of spare RAM is good.


--
Ian.


On Tue, Apr 20, 2010 at 6:16 AM, Chris B <chris_b@inbox.com> wrote:
> Mike cheers for the reply.
>
> Is it worth setting up your own caching or letting the OS do it? I've setup
> a caching system, but if the OS is doing it it seems pointless.
>
> Chris
>
> ----- Original Message ----- From: "Michael McCandless"
> <lucene@mikemccandless.com>
> To: <java-user@lucene.apache.org>
> Sent: Tuesday, April 20, 2010 2:17 AM
> Subject: Re: Doc Caching
>
>
> No, Lucene doesn't.  But the OS usually does (in is IO cache),
> assuming there is spare RAM.
>
> The "only" things that are explicitly held in memory by Lucene are the
> norms ("boost bytes"), terms dict index, deletions bit vector and
> field cache (used eg when you sort by a field), I think.
>
> Mike
>
> On Fri, Apr 16, 2010 at 2:16 AM, Chris B <chris_b@inbox.com> wrote:
>>
>> Hi
>>
>> Does Lucene cache the documents it retrieves? If so in which object?
>>
>> Chris
>>
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