home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.hp
- Path: sparky!uunet!spool.mu.edu!agate!ames!cae780!bkp
- From: bkp@csi.com (Brian K. Pheiffer)
- Subject: HP 7xx problem with virtual memory (thrashing)
- Message-ID: <1992Dec31.193847.6419@csi.com>
- Keywords: virtual memory thrashing
- Organization: Comdisco Systems Inc., Foster City, CA
- Distribution: comp.sys.hp
- Date: Thu, 31 Dec 1992 19:38:47 GMT
- Lines: 20
-
-
- I have found a serious deficiency with the HP-UX memory management and
- was wondering if anyone else has seen this problem: whenever a process
- require more memory than the amount of physical RAM that the system has,
- the HP-UX operating system (8.05,8.07 & 9.0) start ``thrashing'', a
- term HP uses to mean that the disk continues to swap indefinately
- while the process makes no progress!
-
- We have seen this on processes requiring more than 32 Meg on a 32 Mb
- 720 & 730. The problem disappears whenever there is more RAM than the
- process size (i.e. we increased the system RAM to 64 Mb). But this is
- a rediculous solution, especially when the same process runs on a
- similar Sun box w/o problem.
-
- HP mentioned that it solved this problem with HP-UX 9.0, however, we
- haven't seen that to be true. Does anyone else know about this
- problem?
-
- Brian K. Pheiffer
- bkp@csi.com
-