This option plays back data using the same sample intervals as the input recording sessions. The playback view can use statistic types different from those in the recorded data, and it can include some estimated and calculated data items not in the original view. It cannot include snapshot data, such as process or lock status data and current SQL statement data. See Table C-2 for a definitive list of data items that can be converted or added to a playback view.
Choose this option to add or change certain data items when summarization is not required.
This option is valid only when target is client.
Historical Server returns samples whose time intervals correspond to those of samples in the input session(s). However, samples might be truncated to comply with the start_time or end_time specified, or if overlaps occur across input sessions.
If the requested playback start or end times fall in the middle of a sample interval, Historical Server prorates counted values and performs weighted averages on percentages and rates. The weights are the number of seconds that each input sample contributes.
For example, if the playback session start_time is 3 p.m., and an input recording session has 10-minute samples with one starting at 2:55 p.m., the first sample in the playback is the one that started at 2:55 p.m., with all values prorated 50 percent to reflect half a sample.
If playback start_time is later than the input recording session start time, cumulative session values are played back prorated to reflect the partial session. For example, if an input recording session started at 1 p.m., but the playback start_time is 3 p.m., the data item “Device I/O” “Total for Session” would be a prorated value for I/O since 3 p.m.