read/write disk bandwidth monitoring?
Aditya
aditya at grot.org
Wed Apr 14 12:02:25 PDT 2004
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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