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From: EFanwick.STHQ@XEROX.COM
Newsgroups: mod.computers.vax
Subject: Re: A Sudden Change
Message-ID: <861010-060348-1574@Xerox>
Date: Fri, 10-Oct-86 09:02:42 EDT
Article-I.D.: Xerox.861010-060348-1574
Posted: Fri Oct 10 09:02:42 1986
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First, do you have all 8 750's going against one system disk?  I believe
DEC recommendation is  to have not more the 4 CPU's against a system
disk.  Next, are your page and swap files on the same disk as your
system disk, if so you might think about creating secondary page and
swap files on another disk and reducing the size of the primary to the
miminum so  the system use the secondary files thus spreading out  your
disk IO.

Last, you may have fragmented your system disk, using the command
MONITOR IO, observed the WINDOW TURN RATE, if this rate remain above 0
for long periods of time during peak times, this may indicate a disk
that is fragmented.  If you have SPM then use that to determine the
state of your system disks.

Eric S. Fanwick
Systems Engineer
Xerox Corp.
EFANWICK.STHQ@XEROX.COM
(203) 968-4533