The Activity page contains several charts.
To open the Activity page
Click Activity Summary | Activity.
Charts on the Activity page
|CPU Utilization||The CPU Utilization chart shows the CPU activity of the host machine. If the current activity reaches levels of greater than 100 or less than 0, run vmstat(1) to determine the reason for the erroneous values.|
The Run Queue chart shows the amount of CPU time that will be spent performing tasks. The value is expressed as a fraction.
Divide the value by the number of processors running. If the result of the calculation is greater than 1, you may need more processors.
The lines on the chart show the run queue averaged over 1, 5, and 15 minutes. If the value of the 1 minute line divided by the number of processors exceeds the value 1, there is merely a spike in activity. However, if the value of the 15 minute line divided by the number of processors exceeds 1, you may need more processors.
|Total Disk I/O||The Total Disk I/O chart shows the total number of I/O operations for each disk and NFS server.|
|Network Utilization||The Network Utilization chart represents the current network activity for the machine you are diagnosing. It shows the rate at which packets are being received by the machine and are being sent by the machine.|
The Paging chart shows the rate of data pages read from, and written out to, disk over time. Typically, high paging rates indicate insufficient system memory, a large number of processes, or a number of very large processes.
The unit of measure on the Y-axis is dependent on the Operating System.
|Free Memory||The Free Memory chart shows the amount of available physical memory in the machine. For Solaris, this is typically a low number. If necessary, the page-stealing daemon will seek out memory pages to re-claim them.|