Personally, I'd use VMUTIL with a pipe that prepends date and time (and appends to a file).
Frank M. Ramaekers Jr. -----Original Message----- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Bhemidhi, Ashwin Sent: Friday, May 06, 2011 10:05 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: 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 _____________________________________________________ This message contains information which is privileged and confidential and is solely for the use of the intended recipient. If you are not the intended recipient, be aware that any review, disclosure, copying, distribution, or use of the contents of this message is strictly prohibited. If you have received this in error, please destroy it immediately and notify us at privacy...@ailife.com.
