Date: Wed, 14 Apr 2004 15:02:25 -0400 From: Aditya <aditya@grot.org> To: questions@freebsd.org Subject: read/write disk bandwidth monitoring? Message-ID: <20040414190225.GF34327@mighty.grot.org>
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iostat can provide an aggregate number for transactions per second and Bytes
per transaction for a given device, but if it is a block device, is there a
counter accessible from iostat or elsewhere that I can see how much is read
transactions versus write transactions?
> iostat -K -d -I 1
ad0 ad2 da0 pass0
KB/t xfrs MB KB/t xfrs MB KB/t xfrs MB KB/t xfrs MB
0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00
7.50 8 0.06 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00
^C
tells me transactions per device, but not divided into reads versus writes...
Adi
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