Using VMFINFO, as suggested by Larry, I concluded that our system have the PTF applied.
Kurt, we don't have a specific guest performance problem, but as pointed by
David Duff, it is not good to let idles guests in Q3. ALL of our guests
are in Q3, most of them are not idle, but even the idle ones don't go out
Q3.
What can I do? We are using OSA devices, should I use VSWITCH instead, as
suggested by Rob?

Thanks to all replies,

Ronan





Ronan,
The results of the Q CPLEVEL does not necessarily mean that the APAR is on
your system. You need to look more deeply.

Kurt,
Any time a user is in Q3 (unnecessarily) and you can find a way to change
that, it is good for your user farm. Q3 users get an enormous slice of the
pie compared to those in a more interactive one and thus cause a more
jerky
( or perhaps a less consistent ) feel by those trying to vie for
resources.
The better you keep your users in Q0 or Q1 the happier all of your users
that will be.

-----Original Message-----
From: Kurt Acker [mailto:[EMAIL PROTECTED]
Sent: Friday, June 04, 2004 2:56 PM
To: [EMAIL PROTECTED]
Subject: Re: APAR VM63282


If I read the APAR correctly, it does not eliminate the need for guest to
be dropped from the Q3 dispatch list, it just eliminates some network type
activity from increasing the VMDIOACT counter field that may unnecessarily
keep guest in a dispatch list.  If the commands below only move you into
other queues, its probably do to the guest still having some outstanding
work, or the dispatcher believing you have some outstanding work that
needs to complete.

The big question is, are you experiencing a guest performance problem and
looking at this as the reason why?

Kurt Acker




Q CPLEVEL
z/VM Version 4 Release 4.0, service level 0402 (64-bit)

It means that we have the PTF applied??
But our linux guests are still always in Q3. If we put down our eth0 and
do a rmod qdio, the linux guest go to other queues.

Thanks,

Ronan












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