[Gllug] Interrupt storm

[Adrian McMenamin]

On Thu, August 24, 2006 5:02 pm, Paul M wrote:
> One of my servers was faced with surges of a really heavy load this
> morning with the load average peaking at >10.  They went on for 10
> minutes or so at time before tailing off gradually and the whole
> episode lasted maybe 1 or 2 hours. I've been keeping a log of the load
> average for a while and it appears we have had very occasional times
> when the load average has gone up to 3 or so, but nothing this high.
> It cleared up by itself eventually and things are back to normal.
> Monitoring (using dstat -aim) showed that nic throughput, cpu and
> memory usage remained steady and as normal throughout but the inerrupt
> rate went sky high. Nothing has showed up in the logs.  Does anyone
> have any idea what might have caused this, or how  I can isolate the
> problem any further?
>
I saw similar behaviour a whileback on a machine where one part of the
scsi chain was disconnected (ie external device was simply switched off)

-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug