Historical Channel Performance workspace

The Historical Channel Performance workspace is the historical version of the Channel Performance workspace for the monitored channel selected, displaying channel performance information for up to the past 24 hours. Use this workspace to view performance information from monitored channels in the IBM® MQ (WebSphere® MQ) environment. Based on the information provided, you can make changes to improve performance, set up situations, and verify that changes made are improving performance.

If more than one active channel with the same name and connection name exist within the system and you try to view one of the channel's historical performance data, multiple sets of the data will be displayed, one for each active connection. This situation can occur when viewing data for receiver, cluster receiver, or server connection channels.

A channel provides a communications link between two queue managers (running on the same or different platforms) and shields application programs from having to deal with the complexities of a network's underlying protocols. A channel consists of a transmission queue, a message channel agent (communications program), and a communications link.

Note that statistics are not collected from client connection channel definitions and therefore these are not listed in any of the Channel Performance workspaces.

IBM MQ Monitoring agent also provides current and recent versions of this workspace, which you can use to view the latest available report data or a recent snapshot of data taken at a particular point in time.

Predefined views

The Historical Channel Performance workspace includes the following predefined views:

  • Channel Performance This view displays a list of monitored channels over a specified period of time. Select a channel in this view to display its individual performance statistics.

    To view the activity of all monitored channels on a selected queue manager right-click the Channel Performance item under the selected queue manager in the physical view and select Workspace > Channel performance. If your system has a high volume of traffic, different message priorities or uses different types of queues, you might need to define multiple channels to handle this.

    You can use this view to monitor the depth of the transmission queue. If this becomes very deeps and remains so for a long time, consider assigning more channels to the queue to improve performance. This type of problem is especially common if your system has a high volume of traffic, different message priorities or uses different types of queues. You can use the sequence number and logical unit of work information when performing channel recovery and restart operations.

  • Transmission Rates This view shows, as a bar chart, the average transmission rates of each of the selected monitored channels over the specified time period.

For more information on the attributes listed in the tables of this workspace, see Channel Long-Term History attributes.

Predefined links

No other workspaces can be linked to from the Historical Channel Performance workspace.