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
