Looking for job which is causing a large work load

[Margaret Doll]

On Feb 16, 2010, at 12:36 PM, Stainforth, Matthew (SD/DS) wrote:

> It does look like you're being bitten by that bug.
>
> You can kill off the cat processes easily enough with something like:
>
> ps auwwx |grep "cat /sys/hypervisor/uuid" | awk '{ print $2 }' | 
> xargs kill -9
I tried to use killall on the cat processes.  Then I tried to kill  
just one of the cat processes.  This did not work;  the "cat came back."

I did restart the xend process.  The cat programs disappeared.  The  
load came down to less than 1.  The used memory cleared out.  And  
sendmail is working again.

I am not the main administrator on this system, so I will have to wait  
to see if mcelog and xend is needed on this system.

Thanks for your help.
>
> The cron.hourly script is calling mcelog.cron which is supplied by  
> the mcelog package.  If you don't need that package then either  
> remove it (yum remove mcelog) or get rid of the script from  
> cron.hourly (or make it non-executable).
>
> You haven't mentioned that this server is acting as a xen hypervisor  
> so getting rid of the xen kernel if it's not needed might be a good  
> idea, but would definitely require a reboot.
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com 
> ] On Behalf Of Margaret Doll
> Sent: Tuesday, February 16, 2010 12:49 PM
> To: General Red Hat Linux discussion list
> Subject: Looking for job which is causing a large work load
>
> I found the zombie to be
>
> F S   UID   PID  PPID  C PRI  NI ADDR SZ WCHAN  TTY          TIME CMD
> 4 Z    99  5334  5209  0  75   0 -     0 exit   ?        00:00:00
> dnsmasq <defunct>
>
> which was started by
>
> root      5209     1  0  2009 ?        00:00:00 libvirtd --daemon
> nobody    5334  5209  0  2009 ?        00:00:00 [dnsmasq] <defunct>
>
> I also found 622 cat programs in a sleeping state
>
> root      2213  2211  0 Feb02 ?        00:00:00 cat /sys/hypervisor/ 
> uuid
> root      2244  2242  0 Feb11 ?        00:00:00 cat /sys/hypervisor/ 
> uuid
> root      2297  2295  0 Feb14 ?        00:00:00 cat /sys/hypervisor/ 
> uuid
> root      2314  2312  0 Feb07 ?        00:00:00 cat /sys/hypervisor/ 
> uuid
> root      2350  2348  0 Jan29 ?        00:00:00 cat /sys/hypervisor/ 
> uuid
>
>
> This is described in a bug report on
>
> https://bugzilla.redhat.com/show_bug.cgi?id=525386
>
> From the history of the bug report,  it show that the problem was
> resolved.  I have not been able to find the resolution.
>
> free
>              total       used       free     shared    buffers
> cached
> Mem:      16099528   15190480     909048          0     491696
> 11839316
> -/+ buffers/cache:    2859468   13240060
> Swap:      6127608     105888    6021720
>
>
> ps auwwx contains a lot of
>
> ???   print progname ":\n"?????   progname="";????       }????
> { print; }
> root       677  0.0  0.0   3796   400 ?        D    Feb02   0:00 cat /
> sys/hypervisor/uuid
> root       698  0.0  0.0 106652  1608 ?        S    Feb10   0:00 crond
> root       699  0.0  0.0   8700  1036 ?        Ss   Feb10   0:00 /bin/
> bash /usr/bin/run-parts /etc/cron.hourly
> root       700  0.0  0.0   8700   972 ?        S    Feb10   0:00 /bin/
> bash /etc/cron.hourly/mcelog.cron
> root       701  0.0  0.0   8768   668 ?        S    Feb10   0:00 awk -
> v progname=/etc/cron.hourly/mcelog.cron progname {?????   print
> progname ":\n"?????   progname="";????       }????       { print; }
> root       702  0.0  0.0   3796   400 ?        D    Feb10   0:00 cat /
> sys/hypervisor/uuid
> root       773  0.0  0.0 106652  1608 ?        S    Feb06   0:00 crond
> root       774  0.0  0.0   8700  1040 ?        Ss   Feb06   0:00 /bin/
> bash /usr/bin/run-parts /etc/cron.hourly
> root       775  0.0  0.0   8700   964 ?        S    Feb06   0:00 /bin/
> bash /etc/cron.hourly/mcelog.cron
> root       776  0.0  0.0   8768   672 ?        S    Feb06   0:00 awk -
> v progname=/etc/cron.hourly/mcelog.cron progname {?????   print
> progname ":\n"?????   progname="";????       }????       { print; }
> root       777  0.0  0.0   3796   400 ?        D    Feb06   0:00 cat /
> sys/hypervisor/uuid
> root       803  0.0  0.0 106652  1608 ?        S    Feb02   0:00 crond
> root       804  0.0  0.0   8700  1036 ?        Ss   Feb02   0:00 /bin/
> bash /usr/bin/run-parts /etc/cron.hourly
> root       805  0.0  0.0   8700   972 ?        S    Feb02   0:00 /bin/
> bash /etc/cron.hourly/mcelog.cron
> root       806  0.0  0.0   8768   668 ?        S    Feb02   0:00 awk -
> v progname=/etc/cron.hourly/mcelog.cron progname {?????   print
> progname ":\n"?????   progname="";????       }????       { print; }
> root       807  0.0  0.0   3796   400 ?        D    Feb02   0:00 cat /
> sys/hypervisor/uuid
> root       837  0.0  0.0 106652  1608 ?        S    Feb10   0:00 crond
> root       838  0.0  0.0   8700  1040 ?        Ss   Feb10   0:00 /bin/
> bash /usr/bin/run-parts /etc/cron.hourly
> root       839  0.0  0.0   8700   968 ?        S    Feb10   0:00 /bin/
> bash /etc/cron.hourly/mcelog.cron
>
> -- 
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
> -- 
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list