Sets the global rates for updating session-level statistics in memory.
This function returns the previous collection rate value in seconds.
REPLACE FUNCTION SetSessionRate ( SampleRate INTEGER ) RETURNS INTEGER ... ;
- Sets the global rate. The value ranges from 1 to 3600 seconds. If the rate is set to zero an error is reported.
- The collection rate applies to global queries.
There is no option equivalent to the PMPC SET SESSION RATE request Local_Change = Y option because when using the SetSessionRate function, there is no local MONITOR PARTITION in which to apply the rate to.
You can set the SetSessionRate function to a global (SesMonitorSys) rate. That is, a collection rate at which session-level statistics are collected in memory. This rate is returned in the SesMonitorSys data value by the MonitorVirtualSummary function.
The SetSessionRate function provides similar functionality to the PMPC SET SESSION RATE request. For information about this interface, see SET SESSION RATE.
Example: Using SetSessionRate
SELECT SetSessionRate(600); *** Query completed. One row found. One column returned. *** Total elapsed time was 1 second. SetSessionRate(600) ----------------------- 60