From: H. Peter Anvin <hpa@zytor.com>
Date: Sun, 10 Dec 2006 07:05:07 GMT
Subject: Re: kernel.org mirroring (Re: [GIT PULL] MMC update)
Message-ID: <457BB1A3.2070408@zytor.com>
In-Reply-To: <46a038f90612091955i5bdd6e85l749a2f511f27953@mail.gmail.com>

Martin Langhoff wrote:
> On 12/10/06, Jeff Garzik <jeff@garzik.org> wrote:
>> > P.S. Can anyone post some benchmark comparing gitweb deployed under
>> > mod_perl as compared to deployed as CGI script? Does kernel.org use
>> > mod_perl, or CGI version of gitweb?
>>
>> CGI version of gitweb.
>>
>> But again, mod_perl vs. CGI isn't the issue.
> 
> IO is the issue, and the CGI startup of Perl is quite IO & CPU
> intensive. Even if the caching headers, thundering herds and planet
> collisions are resolved, I don't think you'll ever be happy with IO
> and CPU load on kernel.org running gitweb as CGI.
> 

I/O - nonexistent; that stuff will be in memory.

CPU - we have more CPU than you can shake a stick at, and it's 95+% idle.

*NOT AN ISSUE*.