Help: Performance tool — Using the summary display

Using this data, you can assess possible sources of improved performance (faster response time or higher throughput) through software changes, hardware changes, or rule changes.

As PRPC operates, it collects statistics about the demands made on processing resources, and the server system's response. The Performance tool summarizes and formats these statistics and presents them as HTML pages.

Performance data shows the processing demand statistics of your work since you connected, and may help you assess the performance impact between different approaches or configuration choices.

The DB Trace facility records SQL interactions between your PRPC session and the PegaRULES database.

Performance statistics can help you distinguish between performance issues that arise in the PRPC server, the PegaRULES database, or external systems called by the workflow. In all cases, the statistics can help you determine how to improve performance.

Use these links at the top of the summary display:

Link	Effect
Add Reading	A new row of summary performance data appears. Statistics include input/output, elapsed time in seconds for certain processing, cache performance, locking, and server CPU demand, for the most recent interaction. Optionally, first click elsewhere in the portal window and perform one or several interactions that cause the performance you want to measure. The system retains extensive data for each interaction.
Add Reading with Clipboard Size	A new row of summary performance data appears, including the size of the clipboard in bytes. Similar to Add Reading, but may add potentially costly processing. (Using the System Management Application (SMA), you can learn the size of each page. Start the SMA using > System > Tools > System Management Application, select a node, then click the Requestor Management menu item.)
Reset Data	Initializes all counts and totals to zero.
Save data	Lets you save more than 100 statistics and values from each row into a Comma-Separated-Values file (CSV file type) for analysis with Microsoft Excel or other facilities. Column headings correspond to properties in the Code-Pega-PAL class, as presented on the Full Details display. (The value NaN indicates that a statistic was not available.)
Start DB Trace	Starts the DB Trace tool to trace PegaRULES database operations. See DB Trace Results.
DB Trace Options	See Setting DB Trace Options.
Start Profiler	Starts the Profiler too to provide detailed CPU statistics for activity steps. See About the Profiler. The link changes to Stop Profiler.
Show Graph	Presents a bar chart highlighting major factors affecting performance. See Interpreting the Performance Summary chart.
My Alerts	Provides additional detail on alerts from your own requestor session (or other filter criteria you provide). See Working with the My Alerts display.
Help	Displays this help topic.
PDN	Queries the PDN for the most recent articles regarding this tool. WWW access is required.

For each summary row, many more statistics are available on the full detail page. To see full details, click the Full or Init link on a row.

The basic statistics display has three or four rows. On the initial display, statistics in the row labeled Full match those in the bottom row.

As you interact with PRPC, the statistics change to reflect the results of each interaction.

Columns of the display identify these counts and timings. The table below describes returned data. All CPU time is in milliseconds. The properties are stored in the PALPhase clipboard page, and are in the Code-Pega-PAL class.

The number of decimal places in timing results depends on the hardware and software in use. In general, the decimal values shown are significant. Measurement values are since log-in, or since the last Reset, or incremental between rows, depending on the row label.

Click the INIT, FULL, or DELTA links to access the Full Details display for that row. This display provides additional statistics from the same snapshot.

For a description of the contents of that window, see Performance tool — Full Details Display.

When two instances of PRPC are installed on a single Windows server, some Performance tool statistics may not be available on the installation that is started second.