Well there IS code before we "hop on the enclave". Authorisation code and the like. Not being that good a DB2 faker :-) I don't know if there are user exits involved.
But, yes, it's possible the code in DIST other than Enclave is significant. You can always tell for Type 30: TCB and SRB vs Enclave SRB (part of TCB as it's Preemptible-Class). I'm just aware that this would in my experience (FWIW) be a first: Non-enclave in DIST being a problem. But life is full of firsts. :-) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: [email protected] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: Shane Ginnane <[email protected]> To: [email protected] Date: 19/12/2014 03:43 Subject: Re: MIPS, CEC, LPARs, PRISM, WLM Sent by: IBM Mainframe Discussion List <[email protected]> On Wed, 17 Dec 2014 16:12:31 +0000, Martin Packer wrote: >Sounds like you also need to familiarise yourself with how DIST works - >meaning enclaves that run the actual DDF SQL. As I say, unlikely DIST >itself but rather more likely the DDF is "in play". Hmmm - that might be the common lore. DIST may indeed be the culprit rather than DDF enclaves. Where I have seen this there is a *LOT* of enclaves being created - I presumed (without a lot of hard evidence) that the cost of setup/teardown was appearing in DIST. And, of course, DIST is an important address space, and runaway CPU consumption there hurts (almost) everyone else. The OP indicated cancelling a single thread relieves the situation - should be easy enough to track down the likely suspect. Shane .. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
