Re: Finding greedy kernel process
From: Green, Simon (Simon.Green_at_EU.ALTRIA.COM)
Date: Thu, 3 Jun 2004 17:46:00 +0200 To: aix-l@Princeton.EDU
The "wait" process is just what runs when there's no work to do,
i.e. when the system is idle. This is normal.
If you've actually got a performance problem you need to look
I usually start with vmstat, to get an idea of what's going on,
in particular whether there's any paging, and the run-queue size.
Tools such as topas (comes with AIX) and nmon are good for
finding out what processes are actually chewing up CPU.
-- Simon Green Altria ITSC Europe Ltd AIX-L Archive at https://new-lists.princeton.edu/listserv/aix-l.html New to AIX? http://publib-b.boulder.ibm.com/redbooks.nsf/portals/UNIX N.B. Unsolicited email from vendors will not be appreciated. Please post all follow-ups to the list. > -----Original Message----- > From: Lieberg, Patrick [mailto:plieberg@EV3.NET] > Sent: 03 June 2004 16:12 > To: aix-l@Princeton.EDU > Subject: Finding greedy kernel process > > > Starting yesterday around 4pm, the kernel on my 4.3.3 system > has been eating a significant chunk of processor time. I've > looked into this pretty thoroughly and can't seem to find the > culprit. There's been no change from what the disk activity > normally is during this time. > > ps gv lists the two largest hogs as PID 516 and 774, which > are I belive the idle and wait kproc PIDs. Using pprof shows > essentially the same output. > > Anyone have any suggestions on how to proceed?