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Re: [PLUG] is this a sensible CPU time for apache?
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On 2/1/06, Marc Zucchelli <marcz908@yahoo.com> wrote:
> I have a customer on a dedicated server with 3 very
> active websites. Apparently the server seems to be
> hanging from time to time, and he usually just calls
> aplus.net to have them reboot it.
Could you define "hanging"? Does just the webserver hang? Does sshd
hang to? (It's unclear whether you logged in on the console or not)
> Last time he did
> was Sunday. I'm trying to figure out possible causes.
> Last night I logged onto the server and to start
> things off, I just ran "top" The load avg was 0.13,
> he had about 21mb's of ram free and almost all of his
> swap was free. I know his server gets much busier on
> the weekends when he runs his sales, so I dont know.
>
> I left top running all night, and I took a look at it
> again just now, it said the CPU time for httpd
> (running as root) was 5:47. For a second I thought of
> the possibility of a php script hanging because 5:47
> seems like a long time. But I remembered that its
> running as the root user which spawn other processes
> and doesnt serve web pages, so 5:47 might be normal
> for about 3 days.
Why is Apache running as root? It should be running as a seperate
user for the usual security reasons. As for the CPU time, that could
be normal if there are a lot of CPU-intensive PHP scripts.
(Mis-configured Drupal installations come to mind ;-)
A few other things I can think of:
- Did you check Apache logs and system logs? Might there be issues
with the disk?
- Have you run memtest on the machine, just in case RAM is flaky?
- Have you tried just restarting Apache instead of the system to see
what happens?
-- Doug
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