From: Tate, Daniel (DTate@RENALCAREGROUP.COM)
Date: Mon Sep 30 2002 - 10:45:11 EDT
I've got a bit of a mystery on my hands. I am using Veritas Foundation
Suite on a Sun E450 with 20 internal SCSI disks and 10 external FC-AL disks
in a A5200. The system is running Oracle.
FS Blocksize is 8K.
Whenever we read or write to any veritas-controlled drive, our performance
stinks to high heaven - especially on the FC-AL disks. Logging is off on
the veritas partitions.
I/O Wait isn't a problem - at all. 1-5%. Kernel time, however, is at
25-40%. This leads me to suspect the driver. Vxiod reports 10 daemons
running. This is foundation suite 3.5, vxvm 3.2 - I didn't see any patches.
I/O is adequately distributed and the controller cards are in the
higher-performing slots.
Has anyone seen anything like this?
Daniel Tate, SCSA, SCNA, MCSA
Renal Care Group
Unix Administrator
615-345-5643 office
615-394-6355 cell
dtate@renalcaregroup.com <mailto:dtate@renalcaregroup.com> e-mail
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