[ILUG] Re: High load problems with Apache

[Rod Murphy]

I should have mentioned, the server is running a Drupal site - that's what
the singlesignon requests relate to. Thinking about it, that's probably a
good place to start, tho' the long running requests from the client machine
(136.206.222.11) don't all relate to it.

2009/5/5 Rod Murphy <rod.murphy at gmail.com>

> Hi all,
>
> I've been having issues with high load (typically using 95%+ of server CPU,
> tho memory use is normal) on a test server I'm working with for the last few
> days/weeks.
>
> I've tracked the problem down to one client machine (WinXP which happens to
> be in the office on the same network as the server - actually both client
> and server have public IPs - I know, don't ask).
>
> The client machine has no open browser windows so I'm assuming it's got
> some sort of virus/spyware that's causing the problem. Either way, I've
> obviously no control over which clients connect to the server, so I need to
> figure out the best way to protect from such attacks (assuming that's what's
> happening).
>
> I've set up server-status on the server which shows output as follows:
>
> http://pastebin.com/m4c5dfe44
>
> You can access this status live here:
>
> http://beta.zircol.com/server-status
>
> (note, this may not tell you anything once I restart the server)
>
> I've tried playing around with KeepAlive parameters (currently "Off"), but
> it doesn' seem to have helped.
>
> Timeout is set to 300 - I might try reducing that to see it that helps -
> I'll wait for advice first, tho.
>
> If I restart the server, the problem goes away for a few days.
>
> I'm new to the server-status directive, so am not entirely sure what it's
> telling me. If anyone could shed some light on what's going on or suggest
> other methods / tools to investigate the problem further, I'd be very
> grateful for your input
>
> To complicate matters, we're moving office this evening (including the
> server which will get a new IP). So this problem may go away, but if for
> nothing other that my own self-improvemnt, I'd like to figure out how to
> solve it.
>
> Thanks in advance,
>
> Rod.
>
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