ISPConfig 3 runs fine in OpenVZ, I use it for all my servers.
There is no such thing as a perfect openvz settings as they depend on the load of your server etc. Run the command:
cat /proc/user_beancounters
to see which Limit got hit and increase this Limit. Then restart the VM.
As a starting point, this settings should work:
Code:
KMEMSIZE="21055923:21377049"
LOCKEDPAGES="256:256"
PRIVVMPAGES="565536:569632"
SHMPAGES="21504:21504"
NUMPROC="240:240"
PHYSPAGES="0:2147483647"
VMGUARPAGES="33792:2147483647"
OOMGUARPAGES="26112:2147483647"
NUMTCPSOCK="360:360"
NUMFLOCK="188:206"
NUMPTY="16:16"
NUMSIGINFO="256:256"
TCPSNDBUF="1720320:2703360"
TCPRCVBUF="1720320:2703360"
OTHERSOCKBUF="1126080:2097152"
DGRAMRCVBUF="262144:262144"
NUMOTHERSOCK="480:480"
DCACHESIZE="3409920:3624960"
NUMFILE="9312:9312"
AVNUMPROC="180:180"
NUMIPTENT="128:128"