Select Compare Data Sets in the Mode section of the Test Program Performance Analyzer to display two data set log files in the analyzer graph. Use the Base Log File Path and Modified Log File Path controls to select the data set log files to compare. If the Modified Log File Path control is empty when you change display modes, the analyzer launches a browse dialog box for you to select the file you want to use as the modified log file to compare against the existing base log file.

The analyzer graph displays the data in the following colors to indicate differences:

  • Gray—Base data values.
  • Green—A modified data value that is less than the base data value indicates a performance increase.
  • Red—A modified data value that is greater than the base data value indicates a performance decrease.
  • Blue—A modified data value that has a difference in performance from the base data value that is less than the percentage value specified in the Highlight Differences Above control in the Mode section of the analyzer.

By default, the analyzer highlights differences only when the difference between the modified data value and the base data value is greater than 1%. Use the Highlight Differences Above control in the Mode section of the analyzer to change this threshold.

When you complete a test program performance measurement while the analyzer is already comparing two data sets, TSM prompts you to compare the newly generated data set to the current base data set displayed in the analyzer or to the current modified data set displayed in the analyzer.