home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!gatech!paladin.american.edu!howland.reston.ans.net!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!usenet.ucs.indiana.edu!master.cs.rose-hulman.edu!rosevc.rose-hulman.edu!mgrthh
- From: mgrthh@rosevc.rose-hulman.edu (Thomas H. Hopson)
- Newsgroups: comp.os.vms
- Subject: RE: SYSDUMP.DMP File Question...
- Date: 8 Jan 1993 18:23:22 GMT
- Organization: Rose-Hulman Institute of Technology
- Lines: 31
- Distribution: world
- Message-ID: <1ikgqqINNkk7@master.cs.rose-hulman.edu>
- References: <009664BF.0BC52900.27241@swdev.si.com>
- Reply-To: mgrthh@rosevc.rose-hulman.edu
- NNTP-Posting-Host: hydra.rose-hulman.edu
-
-
- In article <009664BF.0BC52900.27241@swdev.si.com>, tillman@swdev.si.com
- ("Brian Tillman, Smiths Industries, VAX Support, x8425") writes:
-
- >The concept of primary/secondary
- >page files was eliminated when VMS was altered to allow up to four page files
- >(none of which need to be on the system disk).
-
- This is not entirely true. If there exists a file named SYS$SYSTEM:PAGEFILE.SYS
- then it will be mapped as a "primary" pagefile *before* SYS$SYSTEM:STARTUP.COM
- gets control (actually, before the dumpfile gets mapped, even). If there is
- no such file, no error is issued. Any pagefile installed by the SYSGEN INSTALL
- command is a "secondary" pagefile.
-
- The differences between the types of pagefiles are minor, but in particular,
- one characteristic that I commented on a while back is that primary pagefiles
- do not have to be set to W:R to have their names appear in a SHOW MEMORY
- listing (to unprivileged users), whereas secondary pagefiles *DO*. Also,
- as you mentioned, you can only crash dump into a primary pagefile.
-
- Also, I believe that it is possible to have more than four pagefiles, the
- limit being controlled by the SYSGEN parameter PAGFILCNT (which has a maximum
- value of 63--63 pagefiles?!). There's also a SWPFILCNT for swapfiles.
-
- - Tom
-
- --
- Thomas H. Hopson work: mgrthh@rosevc.rose-hulman.edu
- VMS Manager / CS geek mgrthh@rhit
- Rose-Hulman Institute of Technology play: hopsonth@cs.rose-hulman.edu
- Terre Haute, Indiana
-