From: Martin Langhoff (CatalystIT) <martin@catalyst.net.nz>
Date: Mon, 23 Oct 2006 06:02:01 GMT
Subject: Re: [PATCH] Use column indexes in git-cvsserver where necessary.
Message-ID: <453C5AD9.4030008@catalyst.net.nz>
In-Reply-To: <20061023050934.GA25018@spearce.org>

Shawn Pearce wrote:
> Tonight I found a git-cvsserver instance spending a lot of time in
> disk IO while trying to process operations against a Git repository
> with >30,000 objects contained in it.
> 
> Blowing away my SQLLite database and rebuilding all tables with
> indexes on the attributes that git-cvsserver frequently runs queries
> against seems to have resolved the issue quite nicely.
> 
> Since the indexes shouldn't hurt performance on small repositories
> and always helps on larger repositories we should just always create
> them when creating the revision storage tables.
 >
 > Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Ack.

I am thinking we need a lightweight schema versioning mechanism to 
decide whether the DB schema needs changes such as this. Too much work 
for this though. ;-)

We have a simple one in Moodle I could port when the time comes.

cheers,


martin
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