Date: Fri, 2 Mar 2007 10:43:34 +0100 (CET) From: Wojciech Puchar <wojtek@tensor.3miasto.net> To: "O. Hartmann" <ohartman@zedat.fu-berlin.de> Cc: freebsd-performance@freebsd.org, freebsd-questions@freebsd.org Subject: Re: (S)ATA performance in FBSD 6.2/7.0 Message-ID: <20070302104219.B5845@chylonia.3miasto.net> In-Reply-To: <45E7F09B.7070005@zedat.fu-berlin.de> References: <45E7F09B.7070005@zedat.fu-berlin.de>
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> another while the box didn't do anything else than copying. I watched the > copy process via 'systat -vmstat 1' and realized, that the value of 'KB/t' > never go byond 128 (128kb buffer limit?). But more frustrating, I never got what's wrong? FreeBSD uses 128k limit by default. edit /usr/src/sys/sys/param.h and change #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ to say #define MAXPHYS (1024 * 1024) /* max raw I/O transfer size */
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