Date: Sun, 14 Jan 2001 12:09:10 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Bruce Burden <brucegb@realtime.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: /swap too large? What?? Message-ID: <200101142009.f0EK9Ah51097@earth.backplane.com> References: <20010113002643.A33278@tigerfish2.my.domain> <200101131927.f0DJRSS34276@earth.backplane.com> <20010113150956.B37497@tigerfish2.my.domain> <200101132205.f0DM5pJ35749@earth.backplane.com> <20010114132520.A79824@tigerfish2.my.domain>
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:> : I have dropped things back to NSWAPDEV=3, and see if that
:> : does anything.
:>
:> That will fix it.
:>
: Indeed it did. While have rarely seen swapping take place
: under normal situations (GIMP, as I mentioned, will swap), it
: was a bit nerve-wracking to see free memory dropping somewhat
: low w/out any swap space. On the other hand, I did note that
: garbage collection is much more aggressive when you don't have
: any swap space!
:
: Bruce
Both -current and 4.x have the low-memory deadlock patches, which
also cleanup the pageout daemon to the point where it is very close
to perfect.
Another thing that helps for systems with no swap is to set the 'H'
malloc.conf flag (e.g. ln -s H /etc/malloc.conf). This allows the
system to more aggressively revert dirty pages free()'d by malloc
back to demand-zero pages.
-Matt
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