How do you read AWR report for performance issues?
How do you read AWR report for performance issues?
Analysis AWR Report
- DB Time(s): Sessions elapsed time in the database.
- DB CPU(s): Sessions elapsed time in the CPU.
- Redo Size: Redo size ( byte ) between two snapshot.
- Logical Reads: Logical read count in the database.
- Block Changes: Block changes count between two snapshot.
What is RAC in AWR report?
sql is replaced by the AWR Global RAC report (awrgrpt. sql) report, a Server Performance AWR RAC report. This report allows you to run a single report from one RAC node that gathers data from all nodes. awrgrpt.sql. When using AWR reports to diagnose performance problems the standard awrrpt.
What are the things to check in AWR report?
The AWR provides a set of tables into which snapshots of system statistics are stored. Generally these snapshots are taken on an hourly basis and include wait interface statistics, top SQL, memory, and I/O information that is cumulative in nature up to the time of the capture.
When to use AWR global RAC report script?
This report allows you to run a single report from one RAC node that gathers data from all nodes. When using AWR reports to diagnose performance problems the standard awrrpt.sql script can be difficult to use as it examines the performance of only one instance of the Oracle RAC database.
How to use AWR reports to diagnose performance problems?
When using AWR reports to diagnose performance problems the standard awrrpt.sql script can be difficult to use as it examines the performance of only one instance of the Oracle RAC database. You can run reports in each instance, but then would have to manually collate the results from all reports.
How to generate AWR report in RAC-dbaclass database?
AWR report can be generating in RAC database using 2 scripts awrrpt.sql or awrrpti.sql awrrpt.sql – > This will generate the one report for the database across all the nodes (i.e for all instances) for a partiular snapshot range.
Where can I find AWR report in Oracle?
It resides in SYSAUX tablespace. By default snapshot are generated once every 60 min and maintained for 7 days. Each snapshot has a unique ID know as “snap_id”. Snapshot detail can be found in “dba_hist_snapshot” view. If we have Database performance issue and not the Database machine, then AWR Report is the place to look at.