Firewall-1

Re: [FW-1] SPLAT Load Average

Subject: Re: [FW-1] SPLAT Load Average
From: "Breithaupt, Dennis" <Dennis.Breithaupt AT ROSSMANN DOT DE>
To: FW-1-MAILINGLIST AT AMADEUS.US.CHECKPOINT DOT COM
Date: Mon, 28 Aug 2006 10:27:55 +0200
Hy all,

we have the same symptom over here (R60HFA03). (Plenty of other RH
machines have a load below 1.0, but most of them with a 2.6 kernel.)

It seems, that the system process "[insmod]" causes the issue.

cluster1:
root       568  0.0  0.0     0    0 ?        DW   Aug09   0:03 [insmod]

cluster2:
root       568  0.0  0.0     0    0 ?        DW   Aug11   0:00 [insmod]


Insmod is in state "D" (uninterruptable sleep) and because of this
counts to the "load average" calculation as 'one' active process,
causing a load average of at least "1.0", I guess.

Please check in your "ps auxf", if insmod is in that state, too. Would
be interesting to know. Which kernelversions do these machines have?
(2.4.21?)

I'm no linux kernel-guru, but doesn't this look like a bug in the kernel
itself? After all, "[insmod]" should not be permanently active on a
linux-system, but only when modules are being installed? On other RH
machines there seems to be no active "[insmod"]-process. How is that
which your boxes?

Regards,

Dennis Breithaupt


Mark Senior wrote:

> cached
> 
> I notice that even though your top output shows 1.0 for all sample
> windows, the CPU states are shown as almost entirely idle.  Which
> doesn't seem to make a lot of sense, as a load average of 1.0 should
> give you a CPU usage very near 100% over the number of CPUs - so 50%
> over both CPUs on a dual-processor system.


still for unknown reasons, all the rhel 3 machines i have installed show
a 1.0 average load even if they're doing nothing. I presume it's a bug
in procps and leave it be. and since splat for ngx is based on rhel3, it
would be a safe assumption to say that they just inherited the bug.

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