>We running on z10 with 16 processors (1264 MSUs), however our LPAR just >has 2 logical processors with 40 MSUs.
> Tried already to shift TCPIP into SYSTEM, but is not allowed. WLM can not > starve STCs defined in SYSSTC. Why does WLM not cut the processor > for the batch jobs which are defined DISCRETIONARY? A few things to look at, but I also think you're out of luck once capping sets in: 1. Check all things TCP for where they run. This is from a machine that also has (sometimes) two cps, but *a lot* less MSUs when in a pinch: TCPRESO SCI1 TCPIP SYSSTC TCPSNMP SCI1 TCPFTP1 SCI4 TCPTN SCI1 TCPGATEP SYSSTC There is also a subsystem type TCP, do you have this defined? Or is there anything in service class SYSOTHER? 2. For us, on the systems with very few MSUs, it is virtually pointless to define different exvels with the same importance level. Hence I have restricted us to use exactly 5 service classes with exvel goals (more SC periods for response time goals), and they basically only differ in the importance level. SCI6 is discretionary. And yes, STC and batch get mixed in the same SC. Ever since I have changed the policy to use these, we feel that an IPL (even when the box is 100% busy) works much smoother and faster than before. This is from the sysprog sandplex. For Production I wasn't allowed yet to change, so I cannot comment on production. 3. How big is your discretionary pool? Are you using this 'guaranteed cpu' (this is the wrong name) feature that will give even discretionary workload a chance to run? And to add even more unclear definitions, I remember a rule that says 'don't define an exvel goal of less than 30% - bad things will happen'. I don't even remember what those bad things were, though, but I still follow that rule. 4. Do you use the SPM rules? 5. How do you issue your ping command? TSO? As an OMVS user? Batch? I may have overlooked that, but why do you think it is *TCPIP* that is slow instead of however the command gets to TCPIP (and the result back)? Now, please someone refresh my memory what those bad things are and how that WLM feature is really called! :-) Regards, Barbara ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
