In the last episode (Aug 21), Chris Knipe said:
Disks ad0 ofod intrn
KB/t 16.83 %slo-z 35456 buf
tps 103 4 tfree 414 dirtybuf
MB/s 1.70 20988 desiredvnodes
% busy 98 5247 numvnodes
Got 1 ATA100 Seagate 120GB disk in there at the moment.... 1.7MB/s at
98% busy? Surely, that figure is WAY low??? I'd expect atleast
about 10MB/s on ATA100.
That number's about right for random I/O and small blocksizes, which is
what the KB/t field shows. If you were doing sequential I/O, the KB/t
field would be at or near 128. Are you also running a "du", "cvs
update", or other command likely to be doing random disk accesses?
ALTER TABLE on a 200MB mySQL table?
I guess its time for a dedicated disk then....
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