Hey there. I'm grasping at straws and am hoping someone remembers their JES2 internals. I've looked in the JES2 Innita Tuna? manual (Ch 2. Controlling JES2 processes) without success and can't find a RedBook that helps. Perhaps someone remembers or can point me to a Fine Manual. (I'll ETR otherwise.)
Background: z/OS v1.7, DB2 v7. During our (peak) registration periods, we experience occasional, un-explainable slow-downs in 1-3 minute bursts on the order of 3-5 in a 2-3 day period. To date, no particular culprit has been positively identified. Aside from 100% CPU & 20+ un-dispatched tasks, one reported symptom is an increasing number of DB2 threads (from OmegaMon) waiting for Stored Procedure start-ups ie. for WLM to start another address space. (@15 TCBs each) Sure enough, once the dust settles, there can be 10+ WLM address spaces that slowly disappear as idle. This line of inquiry (among others) focuses on JES2's internal readers. We suspect processes generating e-mail to students with a 1-1 ratio of jobs to messages ie. 1 job=1 e-message, using SYSOUT=(*,INTRDR). (We're also pursuing multi-step jobs since $HASP050: >90% JNUM has already been encountered.) In a given scenario, we could have 200+ jobs with e-mail (bulk to a large class) directed at INTRDR while WLM is trying to start 1-5 Stored Procedure address spaces via STCINRDR. So, the question is, presuming it's already working on INTRDR, how does JES2 contend with this load? Are all the jobs in INTRDR converted then JES2 switches to STCINRDR? Does STCINRDR have precedence for JES2 and INTRDR is interrupted at the next JOB card? Are they simultaneous with their own TCBs? Curious minds would like to know. (or even hear speculation...) As mentioned before, if there's no satisfactory consensus, I'll pursue an ETR and relay the response. Tks much folx. ----------> signature = 6 lines follows <-------------- Neil Duffee, Joe SysProg, U d'Ottawa, Ottawa, Ont, Canada telephone:1 613 562 5800 x4585 fax:1 613 562 5161 mailto:NDuffee of uOttawa.ca http:/ /aix1.uottawa.ca/ ~nduffee "How *do* you plan for something like that?" Guardian Bob, Reboot "For every action, there is an equal and opposite criticism." "Systems Programming: Guilty, until proven innocent" John Norgauer 2004 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
