What is the load average of the run queue?
First, let’s understand what is Load Average: Load average is the number of jobs in the run queue (state R) or waiting for disk I/O (state D) averaged over 1, 5, and 15 minutes. Example output from uptime/top command:
How to understand the load average in Linux?
When it comes to troubleshooting a performance issue on Linux, it is very important to know the basics of various command outputs such as uptime, vmstat. In this post, we will try to understand the load averages and run queue/blocked queue in terms of CPU utilization. First, let’s understand what is Load Average:
What does run queue of 100 mean in Windows 10?
Run queue column should be always lower/same as number of cores installed on system – of course run queue of 100 can be visible on system with only 8 cores – it will mean that 8 processes are actively being served by CPU and rest 92 are queued and waiting for execution.
What does it mean if run queue is above installed CPU cores?
If run queue is above installed CPU cores investigation should be done in terms of checking APP/DB performance and missing tuning or can indicate that system is not scaled-up properly to serve such run queue/load.
What does load average mean for single core system?
Single Core system – if load average is 1.00 it means that system is fully utilized and if there will be more tasks incoming they will be queue-up and wait for execution. Single Core system – if load average is 2.00 it means that System is already utilized and some tasks are already queued-up and waiting for execution.
How is load average and CPU utilization related?
top shows CPU utilization for running processes while load average shows (since 1993) number of running processes plus number of processes in the uninterruptible state. Processes waiting for work do not consume CPU. As a result top CPU utilization is less that 7/8 * 100%. Not the answer you’re looking for?
What does a CPU load of 1.00 mean?
On a one-lane bridge, that means it’s filled up. On a two-lane bridge, a load of 1.00 means it’s at 50% capacity — only one lane is full, so there’s another whole lane that can be filled. Same with CPUs: a load of 1.00 is 100% CPU utilization on a single-core box.