[K12OSN] OT apache troubleshoot

[Jim Kinney]

You need to run other performance tools to get a better picture than just
top. Iostat will show drive access. Check apache logs to look for web
crawlers. A bad link that causes a process loop can eat your system. A
power blink that causes a small file corruption can generate similar
symptoms.
On Mar 17, 2013 11:36 AM, "Barry R Cisna" <brcisna at eazylivin.net> wrote:

> Tod,
>
> Apache 2.2.15
> 32-bit CentOS 6.3
> AMD E-350 Zacate APU
> 8 GB ram
> Sata-3
>
> Here is a paste from 'top -u apache'
>
> PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
> COMMAND
>  2013 apache    20   0 56296  25m 6040 S  0.0  0.3   0:02.90
> httpd
>  2014 apache    20   0 57320  26m 6096 S  0.0  0.3   0:03.95
> httpd
>  2015 apache    20   0 56260  25m 5484 S  0.0  0.3   0:02.83
> httpd
> 28504 apache    20   0 45600  11m  872 S  0.0  0.2   0:00.01
> httpd
> 28505 apache    20   0 56268  25m 5504 S  0.0  0.3   0:08.05
> httpd
> 28506 apache    20   0 56284  26m 6116 S  0.0  0.3   0:07.55
> httpd
> 28507 apache    20   0 56268  25m 5540 S  0.0  0.3   0:08.47
> httpd
> 28508 apache    20   0 56416  25m 5536 S  0.0  0.3   0:07.06
> httpd
> 28509 apache    20   0 56296  25m 5532 S  0.0  0.3   0:04.99
> httpd
> 28510 apache    20   0 57292  25m 5540 S  0.0  0.3   0:08.66
> httpd
> 28511 apache    20   0 56268  25m 5536 S  0.0  0.3   0:07.11
> httpd
> 28512 apache    20   0 57320  26m 5536 S  0.0  0.3   0:05.82 httpd
>
> The server is running fine like this.
> ,,,
>
> When I noticed the server starting to get sluggish and the load average
> was around 8.00-  9.00,,when I run 'top' with no parameters I would see
> httpd entries about 6-8 times and yes it showed around 25% mem usage
> each. I have never even seen httpd listed when running top before(with
> no extra parameters). This has only happened about 3 times,and it seems
> like it happened after a power outage at my house.Probably just a
> coincedence?
>
> Since I posted this and shut off httpd for 10 mins then restarted I have
> never again seen httpd even listed in top ( this seems to be 'normal")
> with no parameters.
> Just wonder what makes httpd load the server in this fashion and what
> spawns it?
>
> Thanks,
> Barry
>
>
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