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Re: [ic] mod_interchange and Apache MaxClients


On Wednesday, November 16, 2005 9:51 PM, suppressed wrote:

On Wed, Nov 16, 2005 at 12:32:25PM -0800, Ron Phipps wrote:

to use a UNIX-domain socket file, rather than an Inet socket.  All
of the websites I've worked with have used UNIX domain socket
files.  It could be the case that the Inet needs some fine tuning.
It would be interesting to see if the same problem occurs when
socket files are in use.

I've experienced the problem with both unix domain and TCP.

Yep, it seems this is the case - I connect via Unix sockets and seemingly get the same problem as Ron who is connecting via Inet.

I've actually had the problem for years.

Ditto

The frequency with which it occurs is load-dependant on my system.

Ditto, usually only need to restart perhaps once every 2 weeks on a moderately busy site, but over the last few weeks it's been unusual to go 1 day without the restart Apache. Incidentally, every single time my site stops responding MaxClients has been reached (or at least I have never spotted it before MaxClients has been reached), although I appreciate that this is probably a consequence of the underlying problem, not the cause.

Nevertheless, if there is some sort of problem that is causing Apache processes to hang and therefore a cascade of Apache processes to be spawned, wouldn't we expect these hung Apache processes to eventually die of their own accord? One thing I can confirm is that once the has stopped responding and MaxClients has been reached, the Apache process count never falls back down again. I am certain of this e.g. sometimes the site may go down and I don't find out until the following morning, 10 hours later, at which point all 150 (my MaxClients setting) Apache processes are still alive (though I am fairly certain they are not consuming any processor time). Not sure if this casts any additional light on the problem, but I thought I'd mention it anyway... Thanks.

		
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