[CentOS] CPU utils almost 100%-- solved

[Rob Kampen]

fabian wrote:
> Dear Guys
>
> Thanks and apprecite your quick replies
> By the way i had stated solving the problem of almost 100% CPU utulization
> starting everyday at 4 am and ending at 10 am in a very crude way
> top was reporting 95% wa
>
> i started to check the crontab file and noticed that the
> cron.daily entry in the file sarts at 4 am
>
> and in the directory i found
>
>
> -rwxr-xr-x   1 root root   133 Jul  6 16:59 00webalizer
> -rwxr-xr-x   1 root root   379 Jul  6 17:02 0anacron
> lrwxrwxrwx   1 root root    39 Nov  9  2008 0logwatch ->
> /usr/share/logwatch/scripts/logwatch.pl
> drwxr-xr-x   2 root root  4096 Jul  5 21:25 backup
> -rw-r--r--   1 root root    62 Jul  6 17:37 clamav
> -rwxr-xr-x   1 root root   118 Jul  6 17:00 cups
> -rwxr-xr-x   1 root root   456 Nov  3  2008 freshclam
> -rwxr-xr-x   1 root root    26 Jul  6 17:00 havp
> -rwxr-xr-x   1 root root   180 Dec  2  2007 logrotate
> -rwxr-xr-x   1 root root   418 Jan  6  2007 makewhatis.cron
> -rwxr-xr-x   1 root root   137 Jul  6 17:23 mlocate.cron
> -rwxr-xr-x   1 root root  2181 Jun 21  2006 prelink
> -rwxr-xr-x   1 root root   114 Jul  6 17:01 rpm
> -rwxr-xr-x 1 root root   290 Jul  5 21:24 tmpwatch
>
>
> i started movies some of thes files to difereent directory and finally
> found that it was the below file that was the culprit
>
> -rwxr-xr-x 1 root root   290 Jul  5 21:24 tmpwatch
> -------
> the contents of the file was
>
> /usr/sbin/tmpwatch -x /tmp/.X11-unix -x /tmp/.XIM-unix -x /tmp/.font-unix \
>         -x /tmp/.ICE-unix -x /tmp/.Test-unix 240 /tmp
> /usr/sbin/tmpwatch 720 /var/tmp
> for d in /var/{cache/man,catman}/{cat?,X11R6/cat?,local/cat?}; do
>     if [ -d "$d" ]; then
>         /usr/sbin/tmpwatch -f 720 "$d"
>     fi
> done
> ----------------
>
> now everything works fine without this file in the /etc/cron.daily directory
> so the tmpwatch was the culprit cause the CPU wait state to almost 99 %
> for almost 6 hrs
> but jus would like to know if this particular script has any signifance or
> any perfomance issue and my system will run perfect without the file
>
>
> apprecite you help
>
>
> regards
>
> Fabian
>
>
>   
man tmpwatch shows that this is designed to cleanup tmp directories - 
you may want to see why your tmp files are either very many or have some 
other issues
HTH
Rob

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