Sybase 12.5.1 User Manual page 77

Historical server
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User's Guide
the input recording sessionss session lengths and the requested
playback start and end times
To handle these differences, accumulated counts are prorated.
Percentages and rates are weight-averaged, weighted by the
number of seconds that each input sample contributes.
See Appendix C, "Specifications for Defining Playback Views"
for more information.
allow_estimation
specifies whether or not you want playback to estimate values for data
items that cannot be calculated exactly. Valid values are:
(the default) – causes the
disallow
command to return an error if it encounters data items that require
estimation.
– causes playback to estimate values, if necessary, for certain
allow
data items. Some data items cannot be included in a playback view
unless you allow estimation in the playback session.
This parameter is ignored if summarization_interval is
See Table C-2 on page 165 to determine which data items require
estimation.
missing_data_option
when target is
client
hs_playback_sample
available in the input sessions. Valid values are:
(default) – when a time period contains no data, the
skip
hs_playback_sample
period containing data, rather than returning a sample having no
data.
– the
show
hs_playback_sample
for a time period where no data is available. During client
playback, the column headers are returned with zero rows.
When target is
, gaps are not allowed.
file
CHAPTER 4
hs_create_playback_view
, this parameter specifies how the
command treats periods of time when no data is
command goes directly to the next time
command returns a sample even
Command Reference
.
raw
63

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