Changes or problems in your storage environment might be
indicated by server processes or client sessions that run for too
long, by a higher or lower number of sessions than expected, or by
conflicts in schedules.
About this task
You can monitor server processes and client sessions in the
Operations Center to look for the following situations:
- Sessions are running longer than expected
- A client might be slow, it might start late, or it might be waiting
for a storage device that it does not normally use.
- More sessions are running than expected
- There might be a storage resource problem; for example, a storage
device might be unavailable or degraded. There might be a scheduling
conflict.
- Fewer sessions are running than expected
- A network failure or another critical event might have occurred.
- A process is running longer than expected
- A server process might be running outside the time frame in which
you expect it to run.
- There is a conflict of resource usage
- A server process might be waiting for resources that it is normally
able to access.
- There is a conflict of scheduling
- A server process might be running at a time when the server is
busy with other operations, such as backing up clients.
Procedure
To monitor server processes and client and administrative sessions, complete the following steps:
- On the Overview page of the Operations Center, view the Activity area for the total numbers of processes and sessions that are currently active. If numbers differ significantly from the usual numbers that are displayed during your daily storage-management routine, view other status indicators in the Operations Center to check whether there is a problem.
- View the graph in the Activity area to compare the amount of network traffic over the following periods:
- The current period, that is, the most recent 24-hour period
- The previous period, that is, the 24 hours before the current period
If the graph for the previous period represents the expected amount of traffic, significant differences on the graph for the current period might indicate a problem.
- On the Servers page, select a server for which you want to view processes and sessions, and click Details.
- Examine the Client Sessions graph and the Processes graph, which show activity over 24 hours. Identify any periods when many sessions conflict with maintenance processes.
- Click the Active Tasks tab, and review the list of active processes and sessions.
Identify processes or sessions that are running longer than expected.
Tip: If you want to view more status information, hover over the ID number of a session or process. For further status information, you can also issue the QUERY SESSION or QUERY PROCESS commands.
- Select a process or session, and, in the Activity Log pane, review related server messages.
The related server messages can indicate why a process or session is running longer than expected.
Tips:
- If the Activity Log pane is minimized, you can display it by double-clicking the Activity Log bar. You can resize the Activity Log pane by clicking and dragging the Activity Log bar. You can close the Activity Log pane by double-clicking the Activity Log bar.
- To obtain more information about a server message, hover over the message number in the Activity Log pane.
- If you want to review completed and failed processes and sessions from the past 24 hours, click the Completed Tasks tab. The Completed Tasks page is similar to the Active Tasks page.
Tips:
- Hover over the ID number of a session to view the ID numbers of concurrent sessions.
- Related server messages are displayed in the Activity Log pane when you select a process or session. The server messages can help you to determine why a session or process ended irregularly.