Date: Thu, 22 Mar 2001 16:14:11 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: "Michael C . Wu" <keichii@iteration.net> Cc: fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded s cerver Message-ID: <200103230014.f2N0EBC61507@earth.backplane.com>
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:(Why is vfs.vmiodirenable=1 not enabled by default?)
:
The only reason it isn't enabled by default is some unresolved
filesystem corruption that occurs very rarely (with or without
it) that Kirk and I are still trying to nail down. I want to get
that figured out first.
It is true that some people have brought up memory use issues, but
I don't consider memory use to really be that much of an issue. This is
a cache, after all, so the blocks can be reused at just about
any time. And directory blocks do not get cached
well at all with vmiodirenable turned off. So the net result
should be an increase in performance even on low-memory boxes.
-Matt
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