Active session history from the SGA.
Parameter ‘Blocked Sessions only’ allows a blocking scenario root cause analysis, e.g. by doing a pivot in Excel (see example in the online library). The link to blocking sessions is deliberately nonunique without jointing to sample_id to increase the chance to fetch the blocking session’s additional information such as module, action and client_id. In some cases, such as row lock scenarios, the blocking session is idle and does not show up in the ASH then. For scenarios where the blocking sessions are active and part of the ASH, Tanel Poder has a treewalk ash_wait_chains.sql, showing the whole chain of ASH records linked by a unique join, including the sample_id: https://blog.tanelpoder.com/2013/11/06/diagnosing-buffer-busy-waits-with-the-ash_wait_chains-sql-script-v0-2/
We recommend doing ASH performance analysis with a pivot in Excel rather than by SQL, as Excel’s drag- and drop is a lot faster than typing commands manually. A typical use case is to analyze which EBS application user waited for how many seconds in which forms UI and to drill down further into the SQL or wait event root causes.
Column ‘Module Name’ shows either the translated EBS module display name or, e.g. for background sessions, the process name (from the program column) to enable pivoting by this column only. Oracle’s background process names are listed here: https://docs.oracle.com/database/121/REFRN/GUID-86184690-5531-405F-AA05-BB935F57B76D.htm#REFRN104
To identify an object or segment of a hot block, for example causing wait events, Oracle’s dba_extents view is unusable due to performance bugs in 19c+, and Franck Pachot published a workaround here: https://www.dbi-services.com/blog/efficiently-query-dba_extents-for-file_id-block_id/
User Name, Module Type, Module contains, Show Blocking Session Info, Blocked Sessions only, Request Id, Restrict User Name to Client_ID, From Time, To Time, Package Name starts with, Wait Event, Exclude Wait Event, SID - Serial#, SQL Id, Plan Hash Value, Show SQL Text, UI Sessions only, Session Type, Instance Id, Machine, Schema, Action contains, Program contains, Entry Procedure contains, Diagnostic Pack enabled
If you would like to try one of these Oracle EBS SQLs without having Blitz Report installed, note that some of the reports require functions from utility package xxen_util.
We provide an open source Oracle EBS SQLs as a part of operational and project implementation support toolkits for rapid Excel reports generation.
Blitz Report™ is based on Oracle EBS forms technology, and hence requires minimal training. There are no data or performance limitations since the output files are created directly from the database without going through intermediate file formats such as XML.
Blitz Report can be used as BI Publisher and Oracle Discoverer replacement tool. Standard Oracle BI Publisher and Discoverer reports can also be imported into Blitz Report for immediate output to Excel. Typically, reports can be created and version tracked within hours instead of days. The concurrent request output automatically opens upon completion without the need for re-formatting.
The Filters, Columns, Rows and Values fields are used to create and deliver the data in pivot table format with full drill down to details.
The Excel template upload functionality in Blitz Report allows users to create their own layouts by uploading an Excel template with additional sheets and charts, automatically refreshed when the report runs again. This allows to create custom dashboards and more advanced visualizations of report data.
If you would like to optimize your Oracle EBS implementation and or operational reporting you can visit www.enginatics.com to review great ideas and example usage in blog. Or why not try for yourself in our demo environment.
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