OK,
A couple of things that confuse me about fsstat output:
1. Consider the following:
% fsstat /
new name name attr attr lookup rddir read read write write
file remov chng get set ops ops ops bytes ops bytes
13.0K 1.44K 224 76.8M 1.79K 469M 426K 49.7M 12.9G 12.1M 2.53G /
Now, for the numbers measured in bytes I understand that the
multiplier is powers of 1024. I suspect (from comparing fsstat
with raw kstat) that the same scaling is true of the plain
operation counts. Does it make sense to use 1024 as the multiplier
for these, where 1000 would be more natural.
(I would expect factors of 1000, but then would get confused
because different columns have different scaling factors...)
2. I'm running fssat and seeing the following for /
new name name attr attr lookup rddir read read write write
file remov chng get set ops ops ops bytes ops bytes
0 0 0 0 0 0 0 300 119K 215 121K /
0 0 0 31 0 119 0 292 119K 202 120K /
0 0 0 2 0 4 0 314 119K 246 121K /
Huh? I checked with iostat and there's no I/O whatsoever.
The culprit turns out to be a graphical java program sending
it's X traffic back to my machine (tunneled over ssh). This
goes via a socket, and reads and writes to that socket seem
to get allocated to the / filesystem. I don't know where they're
supposed to be accounted for (if at all), but it confused me
for a while until I worked out what was going on.
--
-Peter Tribble
L.I.S., University of Hertfordshire - http://www.herts.ac.uk/
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
