Re: Load shoots very high with disk activity
On Mon, Sep 06, 2004 at 02:09:47PM -0700, Mike Fedyk wrote:
> Danie Roux wrote:
> >Using XFS, and kernel 2.6.8.
> >In the past two weeks I noticed that my PC load shoots up on anything that
> >needs disk activity. The CPU's are quiet during all this:
> >top - 17:04:09 up 6:07, 3 users, load average: 2.25, 1.88, 1.37
> >Cpu0 : 10.3% us, 4.0% sy, 0.0% ni, 76.3% id, 8.7% wa, 0.7% hi, 0.0%
> >Cpu1 : 11.3% us, 3.3% sy, 0.0% ni, 70.4% id, 15.0% wa, 0.0% hi, 0.0%
> >It gets so bad that the mouse starts jerking!
> >Does anyone have some advice on where to start looking for optimizing?
> >(hdparm -t looks fine)
> How about disk subsystem info? IDE, SATA, or SCSI? Controller? Memory?
> Are you reading a bunch of small files or large files?
Sorry about that:
Single IDE drive:
"hda: 156301488 sectors (80026 MB) w/2048KiB Cache, CHS=16383/255/63, UDMA(100)"
On my running
Timing buffered disk reads: 168 MB in 3.03 seconds = 55.51 MB/sec
And a simple "aptitude dist-upgrade" would make my mouse start jerking.
Danie Roux *shuffle* Adore Unix