AIX CPU load average
Posted on 2010-08-27
I have some question regarding to CPU load average given from uptime command. We have also drawn up a performance metric on our AIX server over months. We have tabulated CPU load average in 1 minute, 5 minutes and 15 minutes.
Our AIX server has 2 CPUs.
1. What the CPU load average really means? I read some articles. Some refer it as average number of processes on the queue. Some refer to average number of processes that are using the CPU.
2. What contribute to the load average count? Is it just the process in the queue waiting to be executed and processes that are being executing?
3. Our server load average has a minimum value at 0.25, max at 3.7 and average at 0.92. What value should I started to worry?
4. Given we have 2 CPUs should I divided the load_average value by half for the load_average per CPU?