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- From: iglesias@draco.acs.uci.edu (Mike Iglesias)
- Newsgroups: comp.sys.sun.admin
- Subject: Sun 690MP performance problems
- Message-ID: <2A9FA7FE.2305@orion.oac.uci.edu>
- Date: 29 Aug 92 16:38:22 GMT
- Organization: University of California, Irvine
- Lines: 28
- Nntp-Posting-Host: draco.acs.uci.edu
-
- Earlier this year, we purchased a 4 processor Sun 690MP system to replace
- an aging Sequent Symmetry system as our general Unix timesharing service
- and campus news server (using nntp and c-news). We have 2 IPI disks on the
- system, with swapping on both and the users space taking up most of one of
- the disks. News is currently on a Sun 600mb SCSI disk connected to a
- SCSI/Ethernet SBUS card.
-
- Since we cut over to the 690MP, we have had unsatisfactory performance on
- the 690MP, both for the timesharing users and the people reading news via
- nntp. We have installed the MP performance patches from Sun and they have
- helped, but the performance is still not as good as the Sequent was with
- the same load. We see a lot of processes (mostly the nntpd daemons)
- in "D" state when the system performance gets bad. Response time for
- online users gets slow - people using the Gnu Emacs mhe mail package
- wait a long time (minutes in some cases) for response to commands, "df"
- takes up to a minute to complete, etc.
-
- Is anyone else having problems like these with their 690MP? Sun has made
- some attempts to look into the problem, but all we've heard is that
- "the system is performing as we said it would". We're using ps, vmstat,
- iostat, top, etc trying to find what's going on; does anyone have any
- suggestions on what else we could use to find where the bottlenecks are?
-
-
- Mike Iglesias Internet: iglesias@draco.acs.uci.edu
- University of California, Irvine BITNET: iglesias@uci
- Office of Academic Computing uucp: ...!ucbvax!ucivax!iglesias
- Distributed Computing Support phone: (714) 856-6926
-