Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!mips!daver!bungi.com!news From: pc532@bungi.com (pc532@bungi.com) Newsgroups: comp.sys.nsc.32k Subject: Can't Find MailCenter! Message-ID: <9008151318.AA19895@uunet.uu.net> Date: 15 Aug 90 06:06:54 GMT Sender: news@daver.bungi.com Lines: 41 Approved: news@daver.bungi.com GatorMail-Q Minix Especially if you have 8 MB memory, I suggest that you increase the size of the disk cache in the Minix kernel (NR_BUFS in fs/const.h). I changed the size to 2048 and the speed of compilation when making a Makefile increased drastically. With a small cache most of the time in a compilation was spent in reading the compiler and the like into memory. When the cache is large enough the compilation times are comparable to a sparc or similar. On the other hand it makes it more important to say sync before halting. It probably is a good idea to increase the size of the related hash table (NR_BUF_HASH (I use 1024)). 256 (NR_BUFS) and 128 seemed reasonable with 4MBs. Some other numbers I increased without problems: - number of processes (16 -> 128) NR_PROCS in h/const.h - number of superblocks (5 -> 32) NR_SUPERS in fs/const.h It is funny how most of the numbers seem somewhat underdimensioned when there are 8 MBs of memory, 1.4GB of disk, and around 10 MIPS in a Minix system :-), as we had at one time. Johannes ------------------ RFC822 Header Follows ------------------ Received: by mctgate.mct.anl.gov; 14 Aug 90 23:06:47 Received: from daver.UUCP by uunet.uu.net (5.61/1.14) with UUCP id AA05845; Wed, 15 Aug 90 00:00:34 -0400 Received: by daver.bungi.com (/\=-/\ Smail3.1.18.1 #18.16) id ; Tue, 14 Aug 90 20:10 PDT X-Path: robin.hut.fi!jvh From: jvh@robin.hut.fi To: pc532@bungi.com Subject: Minix Date: Wed, 15 Aug 90 05:46:54 +0259 Message-Id: <9008150247.AA10799@robin.hut.fi> Reply-To: pc532@bungi.com Precedence: bulk