The Multithreaded Service Dispatcher maintains statistics for connections made to services controlled by the Dispatcher.

For each connection the Dispatcher receives, it retains information about the connection including connection times, and source and destination IP addresses. The Dispatcher statistics module uses this information to build more comprehensive statistics. For each Worker Process, the Dispatcher maintains statistics on the current, peak (simultaneous), and total number of connections handled by that process. It also tracks the starting and ending time for each process.

On a "higher" level, the Dispatcher also maintains statistics (including the minimum, average, and maximum) on a per-service basis for the number of concurrent connections, the number of connections received per hour, and the durations of the connections received.

These statistics are viewable with a web browser.

To support viewing the statistics, note that the PMDF HTTP server must be configured to serve out the Dispatcher statistics, and access to the PMDF HTTP server must be enabled. If you have used the web-based PMDF-MTA configuration utility or if you have used the command line Dispatcher configuration utility, pmdf configure dispatcher (UNIX and VMS), then you will already have a suitable HTTP server configuration. These configuration utilities as of PMDF V6.0 will also have generated an HTTP_ACCESS mapping table that allows access only to systems and subnets listed by you as "internal during the configuration". But if you are running with a configuration generated in an older version of PMDF and if you have not already enabled access to the PMDF Service Dispatcher statistics, then you will need to enable such access by adding to the PMDF mapping file an HTTP_ACCESS mapping table with entries such as:

HTTP_ACCESS 127.0.0.1|*|*|*|GET|/dispatcher/* $Y *|*|*|*|GET|/dispatcher/* $N *|*|*|*|*|* $N

The last entry shown is disabling access to all other HTTP server services.

Once the PMDF Service Dispatcher and PMDF HTTP server are configured, access to the Dispatcher statistics has been enabled, and the Dispatcher has been started, you can view the Dispatcher statistics by accessing the URL:

http://hostname:7633/dispatcher/

where hostname is the name of your PMDF system. Figure 11-5 shows an example of Dispatcher statistics display on a sample system.

Figure 11-5 Dispatcher Statistics Page

Note that since the Dispatcher statistics include detailed information regarding what connections were made to your system, it may not be appropriate to make this information publicly available. Just what access permitted is controlled using an HTTP_ACCESS mapping table. Another example access mapping is shown here:

HTTP_ACCESS *|*|*|*|GET|/dispatcher/ $Y 127.0.0.1|*|*|*|GET|/dispatcher/* $Y *|*|*|*|GET|/dispatcher/* $N

This will permit anyone to retrieve general information about the Dispatcher statistics, but only the local system (127.0.0.1) will be permitted to get detailed information about individual processes or connections. You can add other IP addresses, such as your workstation from which you run your browser, to this table.