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Comment on UKOUG Database Server SIG – Leeds May 9th by UKOUG Database SIG Leeds- review « Oracle DBA – A lifelong learning experience

Tue, 14 May 2013 18:54:51 +0000

[…] « UKOUG Database Server SIG – Leeds May 9th […]

Comment on About by John Hallas

John Hallas — Tue, 14 May 2013 18:09:15 +0000

Hi Chris, you are making the fundamental mistake of spelling coloured as we would in the UK whilst Oracle is an American product so they spell it colored. The package is dbms_workload_repository and the procedure in question is add_colored_sql. A good worked example of it can be found at http://dioncho.wordpress.com/2009/01/28/colored-sql-innovative-way-to-capture-your-own-top-sqls/
I also blogged about it in 2010 so it must have impressed me then as well. http://jhdba.wordpress.com/tag/add_colored_sql/

Comment on About by Chris Brown

Chris Brown — Tue, 14 May 2013 11:48:11 +0000

Hi John …I’ve been trying to implement add_coloured_sql procedure on 11g
( you mentioned it at the sig last week )

I can’t find the procedure & the documentation seems confusing as it is refering to ash_report

Any help you can give would be appreciated
regards
Chris B

Comment on UKOUG Database Server SIG – Leeds May 9th by Shameless UKOUG Database Server SIG Plug | ORAganism

Shameless UKOUG Database Server SIG Plug | ORAganism — Thu, 25 Apr 2013 20:30:33 +0000

[...] http://jhdba.wordpress.com/2013/04/25/ukoug-database-server-sig-leeds-may-9th/ [...]

Comment on Purging statistics from the SYSAUX tablespace by Ray Hachem

Ray Hachem — Wed, 03 Apr 2013 17:29:12 +0000

Nice article. Thanks!

Comment on Speeding up datapump exports in 11.1.0.7 by John Hallas

John Hallas — Tue, 19 Mar 2013 16:09:09 +0000

Actually Kamran I did submit a trace file to Oracle from the datapump process when I raised an SR for this. I have just pulled some of the details out of the SR.

I have traced the export worker and master process and the tkprof shows the wait is always on wait for unread message on broadcast channel
Elapsed times include waiting on following events:

Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
wait for unread message on broadcast channel
1469 1.18 1435.04
enq: TQ - DDL contention 1 1.15 1.15
db file sequential read 27 0.04 0.42
latch: row cache objects 2 0.00 0.00

Comment on Speeding up datapump exports in 11.1.0.7 by Kamran Agayev A.

Kamran Agayev A. — Tue, 19 Mar 2013 11:30:21 +0000

Hi John
Have you tried to debug the Data Pump session?

http://kamranagayev.com/2013/03/11/debugging-data-pump-session/

Comment on Speeding up datapump exports in 11.1.0.7 by John Hallas

John Hallas — Tue, 19 Mar 2013 09:50:53 +0000

Did I try playing with ….. what sort of comment is that to DBA professional like me
I have discussed that topic before http://jhdba.wordpress.com/2011/11/16/crash-caused-by-amm-resize-operations-and-high-direct-file-read however that is not really the purpose of this post and besides that it is not best practise to start changing underscore parameters to fix a problem when there is a much better specific fix available.
John

Comment on Speeding up datapump exports in 11.1.0.7 by vkaminsky

vkaminsky — Tue, 19 Mar 2013 09:08:50 +0000

Did you try playing with _SERIAL_DIRECT_READ and _SMALL_TABLE_THRESHOLD parameters? I believe changing them will enable direct reads to PGA as well as serialising the process for small tables – otherwise the process is forced to the parallel mode even if you specify the parallelism…

Comment on Rebuild of standby using incremental backup of primary by John Hallas

John Hallas — Mon, 18 Mar 2013 18:29:39 +0000

Good spot Greg. They should be the same it was just a cut and paste from the same system at different times. I will edit the blog now