I have been monitoring the much improved performance during a heavy load* - using NFS Client mount options: xxx.xxx.xxx.xx:/moodledata /moodledata nfs rw,noatime,sync,rsize=8192,wsize=8192,tcp,timeo=14,intr 0 0
Observations:
1) Disk IOs: Significant increase (see pic)
2) NFS: Significant increase in read requests on both client and server
3) Page Load time: Reduction of 50-20%
4) Apache processes, Load average and uninterupterble process stabilised
5) Reduction in webserver CPU usage
* For an indication of what currently passes as a heavy load for us here are some of yesterday's usage stats:
Number of Logins: 29 973
Unique logins: 15 250
Resource views: 58 520
Quiz attempt: 1 432
Quiz attempt continue: 8 712
Course views: 113 763
Thanks for your assistance Matteo
Heli