Date: Sat, 12 Aug 1995 14:55:53 -0400 (EDT) From: Network Coordinator <nc@ai.net> To: hackers@freebsd.org Subject: Memory usage of BSD Message-ID: <Pine.BSF.3.91.950812144435.18349A-100000@aries.ai.net>
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I am trying to configure a couple of dedicated servers, primarily for www usage. These will be Pentium boxes running at least 20 httpd daemons and a named. There shouldn't be more than 1 or 2 shells running. I am trying to decide how much memory to put in these boxes to prevent disk swapping and thereby get the best performance for CGI-BIN type work. We have a server that has 18 HTTPd's running, about 6 tcsh's, pine, 6 gettys, and a number of other little things, but all of the daemons aren't exactly active all the time. This server has 32 megs of memory and get around without using swap space, but at the moment is carrying 11 megs of SWAP that isn't being used very much. Then again, I can't really say whether it is or not. No process running takes more than say .3% of system memory, and 0% of system CPU time. Yet pine can take 10% of memory and named 8%. I have tried using systat, vmstat and just about everything I can think of to get hard numbers on what memory is used, how much it needs, etc, but can't seem to get consistent numbers in units I understand. This is what Top says: Memory: 19M Act 2180K Inact 5136K Wired 2136K Free 18% Swap According to the man page, I would expect values in the swap area, but I see none. Anyway, after all of this, my question is two fold. 1) Does the server I am talking about here have too little memory for what it does? [Its been up for 20days with similar statistics] and 2) Could I put a dedicated WWW server up with 16 megs of RAM with 20 httpd's or will I need 32? [By could, I mean would it be a smart thing to do or not]. How much memory does BSD need minimum anyway? thanks, -Jerry.
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