Messages in this thread |  | | Date | Thu, 20 Jun 2002 10:10:06 -0700 | From | William Lee Irwin III <> | Subject | Re: McVoy's Clusters (was Re: latest linus-2.5 BK broken) |
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On Thu, Jun 20, 2002 at 11:41:45AM -0400, Sandy Harris wrote: > For large multi-processor systems, it isn't clear that those matter > much. On single user systems I've tried , ps -ax | wc -l usually > gives some number 50 < n < 100. For a multi-user general purpose > system, my guess would be something under 50 system processes plus > 50 per user. So for a dozen to 20 users on a departmental server, > under 1000. A server for a big application, like database or web, > would have fewer users and more threads, but still only a few 100 > or at most, say 2000.
Certain unnameable databases like to have 2K processes at minimum and see task counts soar even higher under significant loads.
Also, the scholastic departmental servers I've seen in action generally host 300+ users with something less than 50/logged in user and something more than 50 for the baseline. For the school-wide one I used hosting 10K+ (40K+?) users generally only between 500 and 2500 (where the non-rare maximum was around 1500) are logged in simultaneously, and the task/user count was more like 5-10, with a number of them (most?) riding at 2 or 3 (shell + MUA or shell + 2 tasks for rlogin to elsewhere). The uncertainty with respect to number of accounts is due to no userlists being visible.
I can try to contact some of the users or administrators if better numbers are needed, though it may not work as I've long since graduated.
Cheers, Bill - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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