Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice!sun-spots-request
From: Steinar.Haug@elab-runit.sintef.no
Newsgroups: comp.sys.sun
Subject: "PMEG problem" patch for 4.0.3 available?
Keywords: SunOS
Message-ID: <404@brchh104.bnr.ca>
Date: 21 Nov 90 14:30:23 GMT
Sender: news@brchh104.bnr.ca
Organization: Sun-Spots
Lines: 27
Approved: Sun-Spots@rice.edu
X-Original-Date: Mon, 5 Nov 90 11:49:46 +0100
X-Sun-Spots-Digest: Volume 9, Issue 367, message 7
X-Note: Submissions: sun-spots@rice.edu, Admin: sun-spots-request@rice.edu

Hello! Can anybody confirm or deny the existence of a patch for the "PMEG
problem" for SunOS 4.0.3? We have a number of SparcStations which we
suspect have just this problem. I've seen several references to a patch
for SunOS 4.1:

> Patch-ID# 100092-03
> Keywords: 4/60, performanc, memory, pmeg, kernel, vm
> Synopsis: poor VM performance of 4/60 with increased memory
> Date: July/27/90
> SunOS release: 4.1
>
> BugId's fixed with this patch:  1038249
> Architectures for which this patch is available: sun4 sun4c sun4-PSR_A
> Obsoleted by: 4.1.1
>
> Problem Description:
>
> The system overheads due to page map entry shuffling is excessive and with
> increased memory, the system overheads increase significantly.

but none yet for 4.0.3. Going to 4.1 is not an alternative; we'd like to
hold off any operating system upgrade until 4.1.1 is available.

Steinar Haug, system/networks administrator
ELAB-RUNIT, University of Trondheim, NORWAY
Email: Steinar.Haug@elab-runit.sintef.no,
	sthaug@idt.unit.no, steinar@tosca.er.sintef.no