Date: Thu, 18 Feb 1999 08:51:53 -0600 (CST) From: freebsd@digistar.com To: Undisclosed recipients: ; Subject: data buffers, disk i/o jsb Message-ID: <Pine.LNX.4.10.9902180827500.1566-100000@digistar.digistar.com>
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hi, Is there a compile-time option that I can compile into the kernel to improve disk caching/buffering? I'm new to the list; if I'm in the wrong list, my apologies. My concern/question is I have recently put together a 2.2.8 test server and noticed that disk access is not up to expectations and I am looking for a way to remedy it. For example, when doing a du or a find across a single slice, the disk is physically accessed every time I du or find. I had expected the first find or du access to read and buffer the first pass, and the second find or du to read from the disk cache or buffer. It seems like there's a lot of wasted disk i/o when it could be avoided by reading from the disk cache. Also, if I boot from the boot floppy for installtion and install the ports collection, the install moves at a much faster pace, like 15K/s. If I install the ports collection after the install is completed (booting from the hard disk) the install takes FOREVER, like 2K/s and there is a HUGE amount of disk access. Is there a compile-time option that I can compile into the kernel to improve disk caching/buffering? Thanks! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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