thanks for the reply... here is a bit more information....
MyCourse Live Environment
Server Function Specification
server1 Apache Frontend 4 CPU, 16Gb Ram, 58Gb HDD (50Gb OS, 8Gb Swap,
server2 Apache Frontend 2 2 CPU, 16Gb Ram, 58Gb HDD (50Gb OS, 8Gb Swap,
server3 MySQL Server 2 CPU, 16Gb Ram, 108Gb HDD (50Gb OS, 8Gb Swap, 150Gb Data)
server4 MySQL Server 2 1 CPU, 4Gb Ram, 108Gb HDD (50Gb OS, 8Gb Swap, 150Gb Data)
server5 NFS Server 2 CPU, 16Gb Ram, 208Gb HDD (50Gb OS, 8Gb Swap, 2Tb Data)
The Servers server2 and server4 are secondary servers (Apache / MySQL), therefore less resources have been allocated.
Server OS (64-Bit) VMware Hardware Storage
server1 SLES 11 SP1 4.1.0 Dell R710 (8 CPU’s x 3.457Ghz) Local
server2 SLES 11 SP1 5.0U1 Dell R810 (12 CPU’s x 1.861Ghz) iSCSI
server3 SLES 11 SP1 4.1.0 Dell R710 (8 CPU’s x 3.457Ghz) Local
server4 SLES 11 SP1 5.0U1 Dell R810 (12 CPU’s x 1.861Ghz) iSCSI
server5 SLES 11 SP1 5.0U1 Dell R810 (12 CPU’s x 1.861Ghz) iSCSI
I was also wrong about the amount of network traffic which is actually just under 37GB an hour....!
The other issue with regard to high DB reads was actually an example of a single user logging in and landing on the "my" page....
The above performance info comes from our staging server and in reality our production server can be impacted much more severely causing page loading times that are significantly longer... It does appear that course instance that house a number of quizzes or scorm objects can increase the amount of DB reads and I wondered if this has impacted anyone else? I am also very surprised that the amount of DB reads for the "my" page should get so high?
Please let me know your thoughts regarding the above as any advice would be appreciated... I know there have been a few discussions regarding VM setups but am unable to get a definitive "feel" as to if this can be implimented with moodle without issues?