RE: Limiting CPUs on SUN
- From: Wolfson Larry - lwolfs <lawrence.wolfson@xxxxxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 12 May 2004 18:37:19 -0500
I found these on GOOGLE re psrset:
http://www.sas.com/partners/directory/sun/sunfire.pdf
http://www.sun.com/sun-on-net/itworld/UIR980501perf.html
Anybody using this with Oracle?
Thanks
Larry
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Wolfson Larry -
lwolfs
Sent: Wednesday, May 12, 2004 12:37 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Limiting CPUs on SUN
Wanted to check on this.
Client (Currently 8174) discovered they're only licensed for X CPUs where
they have X+14. They want to limit this to be in compliance and still run
associated apps.
Someone's looking at CPU_COUNT which I don't think really works at limiting
anything. I've seen it set higher than actual by some DBAs, but didn't hear
what benefit that really was.
Sun does have a psrset command I just heard of. Will that do the job for
them?
Thanks
Larry Wolfson
We did this on TRU64 but we had to modify the OS ourselves. Not a
popular decision.
NAME
psrset - creation and management of processor sets
SYNOPSIS
psrset -a processor_set_id processor_id...
psrset -b processor_set_id pid...
psrset -c [processor_id]...
psrset -d processor_set_id
psrset -e processor_set_id command [argument(s)]
psrset -f processor_set_id
psrset [-i] [processor_set_id]...
psrset -n processor_set_id
psrset -p [processor_id]...
psrset -q [pid]...
psrset -r processor_id...
psrset -u pid...
DESCRIPTION
The psrset utility controls the management of processor sets. Processor sets
allow the binding of processes to groups of processors, rather than just a
single processor. There are two types of processor sets, those created by
the user using the psrset command or the pset_create(2)
<@FPI2SOI;targetdocent=-%2F%2FSun%3A%3ASunSoft%2F%2FDOCUMENT+REFMAN2+Version
+2.0%2F%2FEN;localinfo=pset-create-2;type=> system call, and those
automatically created by the system. Processors assigned to user-created
processor sets will run only LWPs that have been bound to that processor
set, but system processor sets may run other LWPs as well.
System-created processor sets will not always exist on a given machine. When
they exist, they will generally represent particular characteristics of the
underlying machine, such as groups of processors that can communicate more
quickly with each other than with other processors in the system. These
processor sets cannot be modified or removed, but processes may be bound to
them.
l
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