Messages in this thread | | | Subject | Re: McVoy's Clusters (was Re: latest linus-2.5 BK broken) | From | "Timothy D. Witham" <> | Date | 20 Jun 2002 13:42:55 -0700 |
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Another point is that I've seen large multi-user machines that roll a 32 bi pid in less than 1/2 hour. So not only is it a large number of process but also a very dynamic process environment.
Tim
On Thu, 2002-06-20 at 10:10, William Lee Irwin III wrote: > 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/ -- Timothy D. Witham - Lab Director - wookie@osdlab.org Open Source Development Lab Inc - A non-profit corporation 15275 SW Koll Parkway - Suite H - Beaverton OR, 97006 (503)-626-2455 x11 (office) (503)-702-2871 (cell) (503)-626-2436 (fax)
- 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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