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Changing parameter polling cycles
Collector and standard parameters use queries to obtain data from a monitored server or database. The poll time assigned to a collector or standard parameter sets the interval between executions of the query used by the parameter. The default poll times set for collector and standard parameters in PATROL for Oracle are calculated to collect sufficient data to appropriately monitor most systems.
If your system requires longer or shorter poll times, you can change poll times, but do so with the following cautions in mind:
- Increasing poll times could cause untimely notification of problems as they arise.
- Decreasing poll times increases the resources used by PATROL for Oracle, which could lead to performance problems.
- Poll times must exceed the amount of time it takes to execute the query and allow time for the parameter to parse and distribute the data obtained before it must resend the query. To avoid problems, use Debug to find the Query Execution Time before decreasing a poll time.
To find the query execution time
To find out how long it takes a collector or standard parameter to execute a query, turn Debug on for that parameter. When the parameter completes a polling cycle, look at the Debug output and find the Total Execution Time. Execution times can vary, so make sure that you find the longest possible execution time by running Debug on your busiest system during your busiest time.