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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!USCMVSA.BITNET!LDW
- Message-ID: <IBM-MAIN%92082904365224@RICEVM1.RICE.EDU>
- Newsgroups: bit.listserv.ibm-main
- Date: Sat, 29 Aug 1992 02:35:00 PDT
- Sender: IBM Mainframe Discussion list <IBM-MAIN@RICEVM1.BITNET>
- From: Leonard D Woren <LDW@USCMVSA.BITNET>
- Subject: Re: PLPA and COMMON on the same volume
- Lines: 19
-
- I've had PLPA and COMMON on the same volume for many years -- since
- the 64M 3090 at my previous employer. I looked at the paging rates
- for PLPA and for common, and they were something like 2/min and 0/min,
- so I figured it was reasonable to put them on the same volume. I
- sized them normally, i.e., no overflow from PLPA to COMMON. I have
- some vague recollection of a negative performance implication from the
- overflow. Maybe the init and tuning mentions this. Unless your
- paging rate to both datasets is noticably different from zero, I
- wouldn't bother with the overflow business. For one thing, you get an
- ugly message at IPL time, and for another, you need to turn off the
- Omegamon warning about that event. I just make sure that PLPA and
- COMMON are next to each other and to the VTOC.
-
- /Leonard
-
- P.S. The first time I ever saw the IPL-time complaint about overflow
- was a couple months ago when I brought up my new CBIPO 3.1.3 system
- (which replaced an older 3.1.3 CBIPO system.) The upleveled products
- in PLPA must have grown by quite a bit.
-