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stat64
2008 Oct 22
2
smbd high cpu load
We have a Linux file server for a set of computer science and
engineering
labs where each lab contains machines running Mac OS X, Ubuntu Linux,
or some incarnation of Windows. At times the these machines become
almost unusable and I think I have narrowed the problem to smbd
processes
soaking up all the CPU on the server. Running 'top' on the server
reveals a dozen or so entries like
2008 Oct 23
3
high cpu load
...from
strace output as I attached to the offending smbd process:
Culprit #1
I took three sample snapshots, each lasted for several seconds, and I
took them
minutes apart from each other. I noticed many lines involved stat'ing
the
a single file in the 'My Documents' subdirectory:
stat64("My Documents/The Picture of Dorian Grey.rtf", {st_mode=S_IFREG|
0744, st_size=0, ...}) = 0
utimes("My Documents/The Picture of Dorian Grey.rtf", {1224548572, 0})
= 0
To see the frequency of these I grep'ed and use wc -l to get a line
count:
# grep 'stat64("M...