How do I generate ash reports in SQL Developer?
Click on the ASH Report Viewer, and on the window, click on the Generate Report button to generate a new ASH report for a specified time interval. Get Oracle SQL Developer now with O’Reilly online learning.
What Ash report contains?
Just like top sessions, the ASH report shows the top database objects by activity. This information is useful to not only show the hot segments in the sample period, but also to show the method of access by looking at the wait event. -> With respect to Application, Cluster, User I/O and buffer busy waits only.
What is Active session History in Oracle?
Active Session History (ASH) was introduced in Oracle 10g. It samples the activity of each active database session every second. The data is held in a buffer in memory in the database. The design goal is to keep about an hour (your mileage will vary).
What is the difference between AWR and ASH report?
The Name of this reports describe what is the major difference between it and AWR , The ASH contains recent information on active sessions sampled every second. The AWR are taken every one hour and its one hour old will not help in diagnosing issues that are current on the database.
What is CPU wait in Oracle?
“CPU Wait” time is Oracle foreground process OS CPU run queue time. … So I’m very comfortable stating that when DB Time is greater than Oracle process CPU consumption plus the non-idle wait time, it’s probably the result of Oracle foreground process CPU run queue time.
How do I run Addm?
The obvious place to start viewing ADDM reports is Enterprise Manager. The “Performance Analysis” section on the “Home” page is a list of the top five findings from the last ADDM analysis task. Specific reports can be produced by clicking on the “Advisor Central” link, then the “ADDM” link.
How do I view sessions in SQL Developer?
To view sessions: In SQL Developer, click Tools, then Monitor Sessions. A Sessions tab is displayed.
How can I check the performance of SQL query in SQL Developer?
In SQL Developer, you can look at the Explain Plan (or Execution Plan) by going into the Worksheet window (where the SQL query is written). Open your query there, or write the query you want to analyse. Now, click Explain Plan, or press F10. The execution plan is shown in SQL Developer.
How can I generate ash report in RAC?
To generate an ASH report for Oracle RAC:
- At the SQL prompt, enter: @$ORACLE_HOME/rdbms/admin/ashrpti.sql.
- Specify whether you want an HTML or a text report: Enter value for report_type: html.
What is GV session?
GV$session vs V$session is used on standalone database, an gv$session (g=global) is used mostly on RAC environments. AUDSID is a unique identifier for the session and is used in sys.aud$ , as the SESSIONID column. It is the leading column of the only index on sys.aud$
What is Dba_hist_sqltext?
DBA_HIST_SQLTEXT displays the text of SQL statements belonging to shared SQL cursors captured in the Workload Repository. This view captures information from V$SQL and is used with the DBA_HIST_SQLSTAT view.