Date: Thu, 29 Jul 1999 11:01:29 +0200 (CEST) From: chrw <shredder@hack.babel.dk> To: freebsd-isp@freebsd.org Subject: FreeBSD diskcache Message-ID: <Pine.BSF.3.95.990729105134.18576A-100000@hack.babel.dk>
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Can someone enlightned me how the diskcache disk i/o performance is achieved on freebsd? It seem, if one runs a find thru all the fs, it will cache some, but not all of the fs. If one mounts the fs with the asynch option, this was supposed to increase performance/use of io disk cache. I tested this, and noticed no difference, the disk cache appear to be of a fixed size, regardless of available (free) memory, and regardless of a(sync) operations. Can someone indepth explain this, in perspective of the linux way, with a dynamic disk cache which inc/decreases the size of the diskcache this way adapting to the current level of free memory, and this way enhancing disk performance, and perhaps introducing problems regarding fs corruption in a crash or heavy load situation (?). Mvh/ Kind Regards, CW To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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