RHEL 6 CPU load

[Mike Hoskins (michoski)]

-----Original Message-----
From: Blake Hudson <blake at ispn.net>
Date: Wednesday, November 20, 2013 11:03 AM
To: "bind-users at lists.isc.org" <bind-users at lists.isc.org>
Subject: Re: RHEL 6 CPU load

>Daniel, what do you see the load as? I see 4.6% CPU usage (100% possible
>- 95.4% idle).


Wondering the same.  Don't consider 0.00 high load.  ;-)



>I'm not sure which versions of BIND you were using on RHEL5, but the
>newer versions do tend to use more CPU usage (I'll assume due to new
>features, patches, etc in the BIND code).
>
>--Blake
>
>- wrote the following on 11/20/2013 9:37 AM:
>
>We recently upgraded one of our DNS servers to RHEL 6. The other two
>servers are running RHEL 5. The new system is showing much higher CPU
>load than the other two (RHEL 5 machines sit around 11-15%). I am not
>sure if this is related to the OS versions
> or something else. The build procedure for the new system is completely
>different than before which could also be the cause. Any ideas why this
>could be happening?


Were the configure options the same when you built on 5.x vs 6.x? You can
see that with named -V.

You mention a different build procedure -- do you mean named or OS? As a
first step I would focus on those differences. FWIW I have moved about 30
recursive resolvers with the highest iterative workload I've had the
privilege of managing to centos 6.x and had no ill effects so I don't
think it's simply the OS itself.