linux-kernel - Re: How git affects kernel.org performance

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Date:	Sun, 07 Jan 2007 16:06:50 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	git@...r.kernel.org, nigel@...el.suspend2.net,
	"J.H." <warthog9@...nel.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Andrew Morton <akpm@...l.org>, Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>,
	webmaster@...nel.org
Subject: Re: How git affects kernel.org performance

"H. Peter Anvin" <hpa@...or.com> writes:

> During extremely high load, it appears that what slows kernel.org down
> more than anything else is the time that each individual getdents()
> call takes.  When I've looked this I've observed times from 200 ms to
> almost 2 seconds!  Since an unpacked *OR* unpruned git tree adds 256
> directories to a cleanly packed tree, you can do the math yourself.

Hmm... Perhaps it should be possible to push git updates as a pack
file only? I mean, the pack file would stay packed = never individual
files and never 256 directories?

People aren't doing commit/etc. activity there, right?
-- 
Krzysztof Halasa
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