Hi Sam,
1) Yes, you have to build VM from the scratch again in order to get ISE to inherit new disk in consideration.
2) The command to check CPU utilization is "tech top". Also can use "tech mpstat" for CPU usage.
*Note: Once running tech top press "1" to see CPU by core or you will end up seeing CPU percentages above 100% for multi-core systems like ISE.
What is Load Average?
The technical definition of load average is the calculation of the 1,5, and 15 minute average of the number of processes, Running (R) or Runnable (D), per run queue. This means how many process are waiting for CPU time as opposed to CPU precentage which is how much of the CPU is currently being used. Load average can be displayed on ISE with the "tech top" command from the CLI:
jesse-dunkel/admin# tech top
top - 11:15:46 up 10 days, 6 min, 2 users, load average: 0.00, 0.02, 0.00
Tasks: 192 total, 1 running, 191 sleeping, 0 stopped, 0 zombie
Cpu(s): 2.4%us, 0.4%sy, 0.0%ni, 97.1%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 3924380k total, 3800900k used, 123480k free, 314648k buffers
Swap: 8185112k total, 752228k used, 7432884k free, 956256k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2886 oracle 20 0 1439m 57m 52m S 5.3 1.5 3:00.64 oracle
5782 iseadmin 20 0 5369m 740m 13m S 4.0 19.3 195:16.15 jsvc
2514 oracle 20 0 1346m 43m 40m S 0.3 1.1 45:37.60 timestensubd
6006 isemtlog 20 0 3937m 267m 8704 S 0.3 7.0 16:38.09 java
6060 isemtlog 20 0 508m 1408 1276 S 0.3 0.0 35:57.73 Decap_main
14273 oracle 20 0 1441m 48m 42m S 0.3 1.3 0:10.61 oracle
31021 admin 20 0 116m 1548 840 S 0.3 0.0 0:00.02 screen
31054 root 20 0 15028 1376 988 R 0.3 0.0 0:00.08 top
In the example above the 1 minute load average is 0.00, the 5 minute load average is 0.02, and the 15 minute load average is 0.00. This system is has very low utilization so when would this become a problem? This number is a representation of how many process are in each run queue and each CPU has a run queue. A 100% utilized system therefore would mean that each CPU on the system is always handling a process, in the case of a 4 CPU system this would be a load average of 4.00, on and 8 CPU system it would mean an load average of 8.00. It isn't until the load average eclipses the number of CPUs that the in theory the system is overloaded, though this leaves no room for spikes in activity so the generally accepted safe value would be between 70% and 80% of the number of CPUs on the server.
A great analogy for load average is to look at a highway. In our above example, this is a 4 lane highway. Each lane is a CPU queue, if there is bumper to bumper traffic but each lane is still moving at 65mph (posted speed limit) the highway is 100% utilized which would equate to a load average of 4. If another car, think process needing cpu, tries to get onto the highway one of the lanes needs to slow down because there is no room for that car on the highway and the load average has now gone over 100% which would mean the load average is now over 4.
Hope it helps!!!
Regards
Gagan
