Sybase 12.5.1, Руководство пользователя

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APPENDIX C Specifications for Defining Playback Views
User’s Guide
161
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. See Table C-2 on page 165 for a definitive list of data items that
can be converted or added to a playback view.
For each sample interval, Historical Server prorates counted values and
performs weighted averages on percentages and rates to align the data with the
requested playback sample interval. The weights are the number of seconds
that each input sample contributes.
Summary of summarization intervals
Table C-1 summarizes the playback features offered by each of the
summarization_interval values.
Table C-1: Summarization interval features
Feature Raw Actual Entire
Defined
interval
All recorded data items are
available for playback. Yes No No No
Timestamp allowed in
playback view. Yes Yes Yes Yes
Changed statistic types
allowed in playback view. No Yes Yes Yes
Playback to a file (to create
a summarized recording
session) allowed. No No Yes Yes
Calculated or estimated
data items not in input view
allowed in playback view. No Yes Yes Yes
Session (cumulative) data
prorated when playback
starts in the middle of an
input session. No Yes Yes Yes
Sample data prorated when
playback starts in the
middle of an input sample. No – the
sample is
omitted Yes Yes Yes
Summarization. No No Yes Yes
Standardized sample
intervals, with appropriate
data adjustments. No No No Yes