|Evaluating Statistics for the System and Applications / Using VSD to Analyze Statistics|
Start the VSD tool, load statistics files, and maintain the view you want on your statistics.
VSD is a free analysis tool and is provided as-is.
VSD is distributed with Pivotal GemFire XD. To install VSD, install Pivotal GemFire XD. See Installing GemFire XD for instructions.
After you install GemFire XD, you can find VSD in the following location of your installation:
Where <gemfirexd-installdir> corresponds to the location where you installed GemFire XD. If you installed using the RPM, the default location is /opt/pivotal/gemfirexd.
vsd <filename.gfs> ...
After you load the data file, the VSD main window displays a list of entities for which statistics are available. VSD uses color to distinguish between entities that are still running (shown in green) and those that have stopped (shown in black).
If you select the menu item File > Auto Update, VSD automatically updates your display, and any associated charts, whenever the data file changes. Alternatively, you can choose File > Update periodically to update the display manually.
The statistics values (Y-axis) are plotted over time (X-axis). This makes it easy to see how statistics are trending, and to correlate different statistics.
Some statistics are cumulative from when the GemFire XD system was started. Other statistics are instantaneous values that may change in any way between sample collection.
Cumulative statistics are best charted per second or per sample, so that the VSD chart is readable. Absolute values are best charted as No Filter.