Displaying 3 results from an estimated 3 matches for "fop_write".
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fops_write
2008 Dec 02
18
How to dig deeper
In order to get more information on IO performance problems I created the script below:
#!/usr/sbin/dtrace -s
#pragma D option flowindent
syscall::*write*:entry
/pid == $1 && guard++ == 0/
{
self -> ts = timestamp;
self->traceme = 1;
printf("fd: %d", arg0);
}
fbt:::
/self->traceme/
{
/* elapsd =timestamp - self -> ts;
printf("
2008 Dec 17
12
disk utilization is over 200%
Hello,
I use Brendan''s sysperfstat script to see the overall system performance and
found the the disk utilization is over 100:
15:51:38 14.52 15.01 200.00 24.42 0.00 0.00 83.53 0.00
15:51:42 11.37 15.01 200.00 25.48 0.00 0.00 88.43 0.00
------ Utilisation ------ ------ Saturation ------
Time %CPU %Mem %Disk %Net CPU Mem
2007 Apr 22
7
slow sync on zfs
Hello zfs-discuss,
Relatively low traffic to the pool but sync takes too long to complete
and other operations are also not that fast.
Disks are on 3510 array. zil_disable=1.
bash-3.00# ptime sync
real 1:21.569
user 0.001
sys 0.027
During sync zpool iostat and vmstat look like:
f3-1 504G 720G 370 859 995K 10.2M
misc 20.6M 52.0G 0 0