Date: Sat, 8 Dec 2001 14:56:58 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Kirk McKusick <mckusick@mckusick.com> Cc: Robert Watson <rwatson@FreeBSD.ORG>, arch@FreeBSD.ORG Subject: Re: Default value for maxusers Message-ID: <200112082256.fB8MuwL19001@apollo.backplane.com> References: <200112071957.fB7Jvef29774@beastie.mckusick.com>
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:I believe that we should do what BSD/OS did years ago. They default
:maxusers to 0 which tells the system to size it at boot time based
:on the amount of memory available on the system. Small memory machines
:end up with a small value of maxusers and large memory machines ends
:up with a large value of maxusers. In the rare case where the default
:is wrong, the system administrator can set it to some non-zero value
:which the kernel then uses.
OK, how about this. Right now in GENERIC maxusers is set to 32.
Lets make this the minimum. For a maximum (for the auto-sizing)
I recommend a maxusers value of 512 @ 512M of physical ram. e.g.
set maxusers to physical ram / one-megabyte, capped at 512 and never
less then 32. The auto-maxusers would only apply if maxusers is
set to 0 in the config.
That's about 60 seconds worth of work in -stable and -current.
Any objections? No?... Ok, I'll commit it today w/ a 1-week MFC :-)
-Matt
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