Here is a magic command. Change write to read or vice versa to find an abusive VE that causes high system load.
for i in `vzlist -1`; do echo $i `cat /proc/bc/$i/ioacct |grep write`;done|sort -rn -k3|head -n10
Example:
Core4Quad server with 8Gb ram running 100 VPS. Load spikes up to 128 and wa is 89%.
By running above command we choose VE number on the top of the list and stop this VE.
5 minutes later load goes down to 3 and wa is only 3-5%.
for i in `vzlist -1`; do echo $i `cat /proc/bc/$i/ioacct |grep write`;done|sort -rn -k3|head -n10
Example:
Core4Quad server with 8Gb ram running 100 VPS. Load spikes up to 128 and wa is 89%.
By running above command we choose VE number on the top of the list and stop this VE.
5 minutes later load goes down to 3 and wa is only 3-5%.
