Re: [htdig3-dev] doc for cache_size


Subject: Re: [htdig3-dev] doc for cache_size
From: Daniel MacKay (Daniel.MacKay@Dal.Ca)
Date: Fri Dec 10 1999 - 06:19:32 PST


Marcel:

>I just added documentation for wordlist_cache_size... Dont forget it
>is IMPORTANT to set this, otherwize your performance will be BAD.

 - Which index file should we be sizing this against?
 - What is the default?
 - Is this an issue for htdig, or htsearch? Since htsearch only gets
   run once for each query, is performance of the DB an issue?

>Size of memory cache used by Berkeley DB (DB used by the indexer)
>IMPORTANT: It makes a *huge* difference. The rule is that the cache
>size should be at least 2% of the expected index size. The Berkeley DB
>file has 1% of internal pages that *must* be cached for good
>performances. Giving an additional 1% leaves room for caching leaf
>pages.
>
>
> ----------------------
>
> Marcel Bosc
>
> ECILA
> 100 av. du Gal Leclerc
> 93500 Pantin - France
> Tel: 33 1 56 96 10 85
>
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