Topic: Apache 2.0 - 99% CPU - Random times

[djc]

Hello,

I'm running out of ideas with a problem on my box.

Win2k3
Apache 2.0.58
php 4.4.7
mysql 4.1.2.0

At random times, I get notified that my sites are down. I rdesktop into the box and Apache is at 99% CPU time.

Apache access logs show nothing of interest, nor does the error log.

Windows event view shows nothing.

The issue can last for 10 minutes or 2 hours.

If I stop the Apache service and restart it, it pegs at 99% again within a few minutes.

ideas?

[James Blond]

only load needed moules in apache and php. check mysql server if it sends requests to apache.
You could try to run PHP as fastcgi (fcgi) to see if that is the issue.

[djc]

only load needed moules in apache and php. - done

check mysql server if it sends requests to apache. - how do I check this?
You could try to run PHP as fastcgi (fcgi) to see if that is the issue. - will try this if necessary

The server has ran fine for over a year, this problem has been happening only recently (last month or so) and the box is generally dead.

Oddly, this happened last night. Here's some info from MRTG - Daily. I can't image its Apache fielding HTTP requests:

Max Average Current
16 workers 3 workers 2 workers

Max Average Current
3191 accesses/hour 1031 accesses/hour 601 accesses/hour
Max Average Current
14 kB/s 1771 B/s 1561 B/s

[djc]

I installed 2.2.8 to see if the problem was related to the executable. I copied the conf file over, made the appropriate changes, etc. Switched over to 2.2.8. All was well then boom, 99% cpu again.

ANY ideas how to get a lead? I was guessing a DOS attach, however the busyworkers do not exceed 20...

[Kanashii]

TRY DEBUG:

DOWNLOADS "procexp.exe" on google and check precess yoau can iven t check TCP attivation
DOWNLOADS "Filemon.exe" and find what file are open

IF you think this is d.o.s
DISABLED PING IN FIREWALL
DOWNLOADS HARDENIT AND SECUREIT

[djc]

will do.

thanks

[Thog]

I actually just got the same problem... Site was slow so I checked and apache was using 99% CPU... I can't find anything in the errors... I restarted and it seems fine for now.

In process explorer in the TCP connections I noticed an IP from some foreign country and it would not disappear but when I search for that IP in the access.log files, I could not find it anywhere.

[James Blond]

[djc]

I still have this issue.

If it is what James suggests, how is this verified and remedied?

[James Blond]

verifing that is very easy. Unplug the networkwire (if you can) than it should be less CPU usage.


A second idea is heavy mysql action between the mysql deamon and apache (php)

I recommend you to upgrade to Apache 2.2.x which is better designed for Windows. A lot of bugs from 2.0 are gone.

[djc]

Thanks for the reply James.

I actually have 2.2.x installed (downloaded from here) and set it up figuring it was an issue with my installation of Apache or 2.0 in general. The problem remained.

Unfortunately, I can't unplug the cable. The box is remotely hosted.

[navbeacon]

I have the same issue.

Apache/2.2.8 (Win32) PHP/5.2.5 mod_aspdotnet/2.2.

Apache randomly peaks at 99% CPU and stays there. I see nothing in the logs.

[Steffen]

Try in your httpd.conf:

Win32DisableAcceptEx
EnableSendfile Off
EnableMMAP off

Maybe it helps.

Steffen

[navbeacon]

I fixed it by installing the latest network card drivers.

Look on your motherboard/network vendor web site.

[djc]

what kind of network card do you have?