At 10:19 AM -0400 12/10/99, Daniel MacKay wrote:
> >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.
I'll echo Daniel's comments. I hope the default is pretty good since
it's hard to know a priori what the word database size will be! Is
there some way we can set a reasonable default for a completely new
setup and then set the default later to be, say 2% of the current
existing size?
The latter would make update searches pretty good.
-Geoff
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