hi guys,

i am using centos 5, nginx version: nginx/0.8.16
, and php-fpm and i have switched to nginx on one of my very busy servers.

however, i see very high i/o usage, and the site works pretty sloppy.

below is my iostat and df output. as you can see i get around 25 mb/s
written at any time.

mysql is on a second drive, and there is pretty much nothing else.
however i cannot understand why the i/o is so high. i expect that maybe
because of log writing, but i checked the log folder, and it's not.

I have setup in the beginnging the worker processes to 8, but for some
unknown reason after 1 2 minutes, nginx stops, so i had to increase it
to 64, and now it stays up. but i have left the i/o thing, which i
cannot make anything out of it.


Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sda 123.88 0.00 25.94 0 52
sda1 0.00 0.00 0.00 0 0
sda2 0.00 0.00 0.00 0 0
sda3 1.00 0.00 0.02 0 0
sda4 122.89 0.00 25.92 0 52
sdb 15.42 0.07 0.00 0 0
sdb1 15.42 0.07 0.00 0 0
sdc 69.15 0.58 1.27 1 2
sdc1 69.15 0.58 1.27 1 2


root@rum [/usr/local/nginx/logs]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda4 331G 50G 265G 16% /
/dev/sda3 15G 1.2G 13G 9% /tmp
/dev/sda1 99M 18M 77M 19% /boot
tmpfs 7.9G 0 7.9G 0% /dev/shm
/dev/sdb1 367G 60G 289G 18% /home2
/dev/sdc1 58G 13G 43G 23% /home3