FW: High System Load

 
It turns out that one drive had dma off for some reason and I have corrected that.   I also ran the sysctl as below.   Right when I did that the system load was 21.   After about 5 minutes of getting the system catching up it has recovered to a "nicer" load of 6 and dropping.

Thank you! 

Gary H.




-----Original Message-----
From: Jim Paris
To: Mike Hardy
Cc: Kanoa Withington; Huntress Gary B NPRI; 'linux-raid@vger.kernel.org'
Sent: 7/28/2004 8:17 PM
Subject: Re: High System Load

#!/bin/tcsh
while 1
  cat /proc/mdstat
  sleep 1
  clear
end

.. or just 'watch cat /proc/mdstat' :)

There's got to be something else happening on the machine...

I find that if the kernel variable dev.raid.speed_limit_max is too
high (the default, 200000, is usually too high), then the rebuild
could taking all available I/O time.  This can cause every other
process trying to do I/O on the machine to block, which may be the
reason your load average is so high.

Try doing 'sysctl -w dev.raid.speed_limit_max=10000' and see if things
improve.

-jim