Cursors pl sql updating
This information may indicate which events are of interest, however it may be misleading.
Single-instance tuning should be performed before attempting to tune the processes that communicate via the cluster interconnect is false, wait events are ordered by the number of waits.
The following line from the script is how the job is added to the schedule: dbms_job.submit(:jobno, 'statspack.snap;', trunc(sysdate 1/24,'HH'), - 'trunc(SYSDATE 1/24,''HH'')', TRUE, :instno); The benefits of using the script is that it: - Displays the job number assigned - Identifies the number of job_queue_processes set for the database - The next time that the snapshot will occur The Load Profile section of the Statspack report is useful primarily in comparing two reports to see if the load characteristics from the two report periods are similar.
In proactive tuning, you generate reports on a routine basis and check the Load Profile for changes in throughput (shown by the per-second statistics) and changes in application characteristics (shown by the per-transaction statistics).
This level will take even longer to complete since the parent and child latch information are added to the duration of the previous 2 levels, which are already information gathering intensive.
First, because the information gathered is based on the shared_pool_size and secondly the volume of information gathered based on SQL statement information, plus the parent and child latch information.
An event may be waited for a large number of times, however the wait time (if it were available for comparison) may show the actual time waited is small despite the high count, hence the event is not really of interest.One of the requirements to use the DBMS_JOB utility is that the parameter job_queue_processes must be set to a value greater than 0.The script is designed to setup the automation of executing snapshots once every hour.Passing the i_session_id value to the procedure will enable this option.
The following is an example of using this feature: SQL Executing a snapshot interactively can be as easy as accessing SQL*Plus as the PERFSTAT user and using the SNAPSHOT.Snapshots taken from this level will take even longer and it is Oracle's recommendation to only use this level when requested by Oracle technical support personnel.