Zpool shows constant, high read rate, while there is no real reason to be at this level.
Network usage is about 700kb/s, and there is no other process except mysql which have default configuration with query cached turned on.
It's seems that because of this system is very slow.
After reboot read rate is about 1mb or lower and everything is working good. Then after a while read rates are going up and server performance became very, very slow (like freeze).
system:
FreeBSD 8.0 amd64, 4gb ram, 2x1tb seagate baracuda as mirrored ZFS raid
zpool iostat 1:
top:
Network usage is about 700kb/s, and there is no other process except mysql which have default configuration with query cached turned on.
It's seems that because of this system is very slow.
After reboot read rate is about 1mb or lower and everything is working good. Then after a while read rates are going up and server performance became very, very slow (like freeze).
system:
FreeBSD 8.0 amd64, 4gb ram, 2x1tb seagate baracuda as mirrored ZFS raid
zpool iostat 1:
Code:
zroot 98.5G 821G 622 0 76.2M 0
zroot 98.5G 821G 802 0 98.0M 0
zroot 98.5G 821G 560 0 67.0M 0
zroot 98.5G 821G 521 0 62.9M 0
zroot 98.5G 821G 468 0 48.7M 0
zroot 98.5G 821G 751 0 91.6M 0
top:
Code:
last pid: 6044; load averages: 0.07, 0.23, 0.38 up 0+04:02:39 17:34:24
1554 processes:1 running, 1553 sleeping
CPU: 1.1% user, 0.0% nice, 3.7% system, 0.2% interrupt, 95.0% idle
Mem: 2499M Active, 817M Inact, 472M Wired, 1704K Cache, 153M Free
Swap: 8192M Total, 8192M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
6044 site1 1 46 0 105M 12332K accept 0 0:00 0.29% php-cgi
6041 site1 1 46 0 105M 13312K sbwait 0 0:00 0.20% php-cgi
6042 site1 1 45 0 105M 13036K accept 0 0:00 0.10% php-cgi
4997 mysql 160 44 0 313M 216M umtxn 0 1:17 0.00% mysqld
4798 www 66 44 0 107M 31276K lockf 0 0:41 0.00% httpd
4803 www 66 44 0 108M 31680K lockf 3 0:21 0.00% httpd
4809 www 66 44 0 112M 34008K lockf 3 0:13 0.00% httpd
4801 www 66 44 0 109M 32400K lockf 2 0:13 0.00% httpd
4800 www 66 44 0 106M 29860K kqread 3 0:12 0.00% httpd
4806 www 66 44 0 108M 31728K lockf 2 0:11 0.00% httpd
4805 www 66 44 0 107M 30852K lockf 2 0:10 0.00% httpd