Apache 1.3 + PHP 5 on FreeBSD 6 -- bad performance under load

[Clement Laforet]

On Wed, Feb 15, 2006 at 04:15:26PM +0000, BSD wrote:
> As you can see, it took 10 seconds to reply to the GET, yet the 
> accepting of the connection was instant.
> I have more than enough maxfiles, maxproc, maxfilesperproc, nmbclusters 
> etc. I guess the connection is so promptly answered because of the http 
> accept filters built in the kernel.
>
> As a final note, the MaxClients I'm using are not nearly enough (around 
> 200 connections/second, according to pfstat graphics vs MaxClients 98). 
> The reason for this is that trying to match MaxClients with the real 
> load resulted in two 0.0% idle processors, since the PHP code is a bit 
> heavy. I've opted to disable KeepAlive and lower MaxClients instead. 
> Could this be the delay I'm seeing ? I think so, but I need more 
> opinions, so feel free to reply.

It looks like requests are stuck in the listen backlog.

clem
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