Re: defragfs did not help
From: tjchamp (tjchamp_at_qwest.net)
Date: 03/12/04
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Date: 12 Mar 2004 08:34:20 -0800
"C C" <someone@microsoft.com> wrote in message news:<cd64c.33031$PY.2555@newssvr26.news.prodigy.com>...
> Jim, our datavg has only one file system in it. There are four physical
> scsi (high speed) 18-gig disk drives. I think these four disks are
> configured as mirrored array. Here's is the lsattr for hdisk2:
>
> pvid 000140ff8bc103800000000000000000 Physical volume identifier
> False
> queue_depth 3 Queue DEPTH
> False
> size_in_mb 18200 Size in Megabytes
> False
>
>
> "Jim" <jsmith@fluidmaster.com> wrote in message
> news:82e9a4d8.0403111344.773f3b26@posting.google.com...
> > Well..there's definitely no doubt that your performance problems are
> > due to heavy disk I/O. A few questions for you...
> >
> > Are any of the other disk drives as busy?
> >
> > What kind of disk is hdisk2 (size, type (scsi/ssa)?
> >
> > What kind of disk adapter is it connected to?
> >
> > Can you execute an lsattr -El against hdiskk and let me know the
> > output?
> >
> > What kind of database application are you running?
> >
> > Jim
> >
> >
> >
> > "C C" <someone@microsoft.com> wrote in message
> news:<o6Z3c.32697$PY.5867@newssvr26.news.prodigy.com>...
> > > Thanks Jim.
> > >
> > > Here's a 14-line iostat of hdisk2. Actually datavg is in 4 pv's:
> hdisk2,
> > > hdisk3, hdisk4, & hdisk5. I also have the the lspv output on the 4 pv's
> > > below. Note that hdisk2 and hdisk4 have 0 Free PP's. I don't know what
> > > this mean.
> > >
> > > Thanks for your help.
> > >
> > > CC
Do an lsvg -l datavg. That will tell you if you are mirroring your
lv's. Then use the lslv -l logical_volume_name to determine which
disks any particular lv is on. These commands in conjunction with the
filemon output should help you reorganize your disk activity better.
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