Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watnot!watmath!clyde!cbatt!cwruecmp!hal!ncoast!allbery From: allbery@ncoast.UUCP Newsgroups: comp.unix.questions Subject: System load problems; like some info Message-ID: <2089@ncoast.UUCP> Date: Mon, 16-Feb-87 21:05:07 EST Article-I.D.: ncoast.2089 Posted: Mon Feb 16 21:05:07 1987 Date-Received: Tue, 17-Feb-87 23:27:56 EST Reply-To: allbery@ncoast.UUCP (Brandon S. Allbery) Distribution: world Organization: Cleveland Public Access UNIX, Cleveland, OH Lines: 35 Our computer (net site ``tdi2'', connected to ncoast) is a Plexus P/60-plus with 68020 processor board, IMSP disk controller, 4 ICPs, Cipher tape controller, (presently) 5 MB of RAM and two 144MB hard drives (Fujitsu B series, as opposed to M-series ``Eagles''). We run System V.2. (no paging) Our problem: We average 16 users and peak at 18 at certain times during the day. So does apparent system load; I watched a program take over seven minutes to display a screen today. Insofar as I have been able to determine, the cause of the slowdown is a constant stream of large processes that start up, run for a few minutes, and exit, then repeat with another large program. This cannot be changed easily; if it were made one large program, that program would force too much swapping to occur if run by the 14 users who use the system doing the fork()s daily at the same time. Our question: Can anyone suggest changes to our installation to help us keep a reasonable response time with this kind of load? (Aside from scrapping the Plexus in favor of a Cray 1...) We would prefer a solution which does not require replacement of the P/60, although if that's the only way... Please EMAIL replies to ..cbatt!cwruecmp!ncoast!allbery or ..!ncoast!bobw. Brandon S. Allbery, Manager of Data Processing Robert L. Weinberg, Division Manager -- Electronic Products Tridelta Industries, Inc. 7350 Corporate Boulevard Mentor, Ohio 44060 (216) 255-1080 -- ++Brandon (Resident Elf @ ncoast.UUCP) ____ ______________ / \ / __ __ __ \ Brandon S. Allbery !ncoast!allbery ___ | /__> / \ / \ aXcess Co., Consulting ncoast!allbery@Case.CSNET / \ | | `--, `--, 6615 Center St. #A1-105 (...@relay.CS.NET) | | \__/ \__/ \__/ Mentor, OH 44060-4101 \____/ \______________/ +1 216 974 9210