Date: Thu, 4 Oct 2007 16:27:20 -0700 (PDT) From: Doug Barton <dougb@FreeBSD.org> To: Artem Kuchin <matrix@itlegion.ru> Cc: freebsd-stable@freebsd.org Subject: Re: Quation about HZ kernel option Message-ID: <alpine.BSF.0.9999.0710041625190.17632@qbhto.arg> In-Reply-To: <02d401c805cb$abf59ec0$0c00a8c0@Artem> References: <02d401c805cb$abf59ec0$0c00a8c0@Artem>
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On Wed, 3 Oct 2007, Artem Kuchin wrote:
> Hello!
>
> What value of HZ option would you recommend for a hosting (web) server
> with a lot of processes (about 900) and polling off (as decided from
> previous discussion polling is useless in this situation).
Is this an SMP system? If so you'd probably be well served by testing the
latest 7.0-current (which will soon be a beta for 7.0-release) with the
ULE scheduler. That's likely to have more benefit for you than changing
HZ, although setting it to 100 is probably going to be better than 1000
for reasons others have already mentioned.
hth,
Doug
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