Hello Marcy,
Current PAGE space utilization is 12.3% utilized of 2 3390-3 DASD, highest
page utilization of 28%. Utilization of below 50% should be alright to run
with, correct? Around the time of the event the page space usage was around
12%.
q alloc page
EXTENT EXTENT TOTAL PAGES HIGH %
VOLID RDEV START END PAGES IN USE PAGE USED
------ ---- ---------- ---------- ------ ------ ------ ----
LEPG1A 5814 1 3338 600840 74453 166317 12%
LEPG2A 5815 1 3338 600840 74948 166320 12%
------ ------ ----
SUMMARY 1174K 149401 12%
USABLE 1174K 149401 12%
Thank you,
Ashwin
-----Original Message-----
From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf
Of Marcy Cortes
Sent: Friday, May 06, 2011 3:28 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Problem with z/Linux guest Ethernet frames (buffering ?)
How full is your page space? (Q ALLOC PAGE).
Marcy
-----Original Message-----
From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf
Of Bhemidhi, Ashwin
Sent: Friday, May 06, 2011 8:05 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: [IBMVM] Problem with z/Linux guest Ethernet frames (buffering ?)
I will build a rexx exec that will run the IND QUEUES Command. What
command/facility do I use to schedule the exec to run every 10 secs, is there
something in z/VM that is similar to SCHEDULE/CRON.
I updated SRM buffer setting to allow for storage over commit. Since this is a
production LPAR I am not comfortable changing SRM setting(to defaults) with out
being absolutely sure of what it might affect. The guest ran well for more than
3 months with the current SRM setting before we started seeing the network
issue.
It appears that we are running pretty tight. This z/VM LPAR is pretty small has
768 MB central and 256 Xstor , 2 X 3390-3 PAGE DASD. It runs 9 Linux guest ( 8
Prod, 1 standby) of 80MB memory, 16 MB, 48 MB VDISKs and 128 MB DASD SWAP disks
. The guest are paging a little bit. Our application is 99.9% network
IO(protocol convertor). We will be adding some memory to this LPAR during our
maintenance this month to ease up on resources. VM CPU utilization seems to be
a MAX 4% of 2 ILFs.
When the problem occurs, it only happens on one of 8 machines machine, even
though all the machines are polled similarly. The machine that has problem
keeps changing and it appears to be paused for around 25+ seconds as we do not
drop any frames just that they are delayed.
Thank you,
Ashwin
-----Original Message-----
From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf
Of Alan Altmark
Sent: Thursday, May 05, 2011 5:07 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Problem with z/Linux guest Ethernet frames (buffering ?)
On Thursday, 05/05/2011 at 03:22 EDT, "Bhemidhi, Ashwin" <ashw...@ti.com>
wrote:
> Right now there is the eligible list is 0. I could not check the queues
at the
> time of event, the 3 times it occurred was either during after business
hours
> or over the weekends. By the time I was able to logon the eligible list
was 0.
You can write an exec that issues IND QUEUES every, say, 10 seconds. If
the result shows no-zero eligible lists, record the results (with the
time) in a file or on the (spooled) console. Start it when you leave for
the day.
> I did change the SRM storbuff setting from the default to 300%, 300%,
200%.
Why? If you put it back to the defaults, does the problem go away?
Alan Altmark
z/VM and Linux on System z Consultant
IBM System Lab Services and Training
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott
