Re: bypassing unified buffer cache?
Re: bypassing unified buffer cache?
- Subject: Re: bypassing unified buffer cache?
- From: Jonas Maebe <email@hidden>
- Date: Sat, 29 Jul 2006 21:42:21 +0200
On 26 Jul 2006, at 22:21, Quinn wrote:
Also, for maximum effectiveness, you should ensure that your disk I/
Os are to a page aligned buffer, at a page aligned offset with the
file, and are an even multiple of a page in length.
A similar question just popped up on perfoptimization-dev. If
Microsoft and Adobe aren't filing bugs over this, it might
nevertheless be interesting for some Apple engineers evaluate the way
the cache flushing daemon (update) behaves, since it's apparently
killing performance for various apps (possibly including things like
Entourage, which I think should not require something like F_NOCACHE
for its mail database).
See http://lists.apple.com/archives/perfoptimization-dev/2006/Jul/
msg00047.html and follow-ups, in particular http://lists.apple.com/
archives/perfoptimization-dev/2006/Jul/msg00056.html and http://
lists.apple.com/archives/perfoptimization-dev/2006/Jul/msg00057.html
Jonas
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