document BUFCACHE
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.\" $NetBSD: options.4,v 1.64 1998/10/29 21:22:34 jonathan Exp $
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.\" $NetBSD: options.4,v 1.65 1998/11/01 09:59:33 lukem Exp $
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.\"
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.\" Copyright (c) 1996
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.\" Perry E. Metzger. All rights reserved.
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@ -1154,9 +1154,12 @@ Increase this value if you get
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.Dq out of space in kmem_map
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panics.
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.\" , which mean you have run out of mallocable kernel memory.
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.It Cd options BUFCACHE=value
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Size of the buffer cache as a percentage of total available
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.Tn RAM .
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.It Cd options NBUF=value
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.It Cd options BUFPAGES=value
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These option set the number of pages available for the buffer cache.
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These options set the number of pages available for the buffer cache.
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Their default value is a machine dependent value, often calculated as
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between 5% and 10% of total available
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.Tn RAM .
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