LivePerf can record into an offline file all performance data collected during a monitoring session. This data can later be replayed in offline mode (without a connection to agents or Host Managers) for further analysis.
Logging can be enabled at any point during a monitoring session by clicking the 'Data Logging' button on the toolbar. Incoming data will start being recorded in the selected log file. The current version of LivePerf only supports logging to a disk file.
To replay a logged session click the 'Load Log' toolbar button and select the log file. The Console's user interface will change slightly to show the log playback controls.
Since all data is already available, the Sampling Interval toolbar control is replaced by a 'Replay Speed' slider. As the name suggests, this slider controls the speed by which data is read from the log file and displayed on screen.
You can have even more control over the speed of the replay operation by adjusting the aggregation interval (Settings / Data Log & Replay / Aggregation period). The aggregation interval is specified in seconds; all samples collected during this interval will be averaged into one value. Increasing this value can speed up considerably the replay of large log files, although at the expense of some detail. Set this interval to 0 to disable aggregation.
In log playback mode the session tree is still available but with the following restrictions:
It is important to note that replaying a log does not limit your ability to plot different counters or to define custom views. All counters that were enabled during recording are now available for plotting, regardless whether they were plotted during the original monitoring session or not.