Mailing List Archive: Pacemaker 10-15% CPU.

Hello,
We are using Pacemaker to manage the services that run on a node, as part
of a service management framework, and manage the nodes running the services
as a cluster. One service will be running as 1+1 and other services with be
N+1.

During our testing, we see that the pacemaker processes are taking about
10-15% of the CPU. We would like to know if this is normal and could the
CPU utilization be minimised.

Sample Output of most used CPU process in a Active Manager is

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
189 15766 30.4 0.0 94616 12300 ? Ss 18:01 48:15
/usr/libexec/pacemaker/cib
189 15770 28.9 0.0 118320 20276 ? Ss 18:01 45:53
/usr/libexec/pacemaker/pengine
root 15768 2.6 0.0 76196 3420 ? Ss 18:01 4:12
/usr/libexec/pacemaker/lrmd
root 15767 15.5 0.0 95380 5764 ? Ss 18:01 24:33
/usr/libexec/pacemaker/stonithd

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
189 15766 30.5 0.0 94616 12300 ? Ss 18:01 49:58
/usr/libexec/pacemaker/cib
189 15770 29.0 0.0 122484 20724 ? Rs 18:01 47:29
/usr/libexec/pacemaker/pengine
root 15768 2.6 0.0 76196 3420 ? Ss 18:01 4:21
/usr/libexec/pacemaker/lrmd
root 15767 15.5 0.0 95380 5764 ? Ss 18:01 25:25
/usr/libexec/pacemaker/stonithd

We also observed that the processes are not distributed equally to all the
available cores and saw that Redhat acknowledging that rhel doesn't
distribute to the available cores efficiently. We are trying to use
IRQbalance to spread the processes to the available cores equally.

Please let us know if there is any way we could minimise the CPU
utilisation. We dont require stonith feature, but there is no way stop that
daemon from running to our knowledge. If that is also possible, please let
us know.

Thanks,
Karthik.

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On Fri, Oct 30, 2015 at 10:02:49AM +0000, Karthik wrote:
> Hello,
> We are using Pacemaker to manage the services that run on a node, as part
> of a service management framework, and manage the nodes running the services
> as a cluster. One service will be running as 1+1 and other services with be
> N+1.
>
> During our testing, we see that the pacemaker processes are taking about
> 10-15% of the CPU. We would like to know if this is normal and could the
> CPU utilization be minimised.
>
> Sample Output of most used CPU process in a Active Manager is

> We also observed that the processes are not distributed equally to all the
> available cores and saw that Redhat acknowledging that rhel doesn't
> distribute to the available cores efficiently. We are trying to use
> IRQbalance to spread the processes to the available cores equally.
>
> Please let us know if there is any way we could minimise the CPU
> utilisation. We dont require stonith feature, but there is no way stop that
> daemon from running to our knowledge. If that is also possible, please let
> us know.

Has been answered on the Pacemaker/Clusterlabs list meanwhile.

--
: Lars Ellenberg
: http://www.LINBIT.com | Your Way to High Availability
: DRBD, Linux-HA and Pacemaker support and consulting

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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