Correct me if I'm wrong, Stefan and Jonathan, but with her limited access,
will she be able to use the SQL Monitor or tools that query ASH, (not even
looking at licensing...)
I know I'm limited with what I can offer on the EM or AWR/ASH side as she
would need access to this data and licenses...
Thoughts?
Kellyn
[image: Kellyn Pot'Vin on about.me]
Kellyn Pot'Vin-Gorman
about.me/dbakevlar
<http://about.me/dbakevlar>
On Mon, Apr 25, 2016 at 11:44 AM, Stefan Koehler <contact@xxxxxxxx> wrote:
Hello Jessica,
unfortunately you have not mentioned your Oracle version and OS, but
several ways to identify the objects.
I guess you want to know possibilities for step 3 in case of logical I/O -
so here we go:
1) SQL Monitoring Report (needs additional license)
2) DTrace for Solaris:
https://alexanderanokhin.wordpress.com/2011/11/13/dynamic-tracing-of-oracle-logical-io/
3) SystemTap for Linux:
https://db-blog.web.cern.ch/blog/luca-canali/2014-12-life-oracle-io-tracing-logical-and-physical-io-systemtap
4) SQLd360 using ASH (needs additional license and can be queried manually
as well, but i highly recommend SQLd360 for it):
https://mauro-pagano.com/2016/01/06/execution-plan-tree-temperature/
Your step 1 and 2 can be done with one tool - the well known fish called
"Snapper": http://blog.tanelpoder.com/files/scripts/snapper.sql
Best Regards
Stefan Koehler
Freelance Oracle performance consultant and researcher
Homepage: http://www.soocs.de
Twitter: @OracleSK
Jessica Mason <jessica.masson85@xxxxxxxxx> hat am 25. April 2016 um19:10 geschrieben:
which normally takes few hours to complete, had been running for more than
Hello List,
Last week, I was involved in a production issue, where a data load job,
48 hours. I tried to take the following systematic approach to identifythe cause -
the session was on CPU.
Step 1 - Identify the session and started profiling it. All the time,
view was queried and below were the top statistics that were changing :
Step 2 - To understand why the session was burning CPU, the v$sesstat
these logical IOs were happening so that I could focus on the operations,
43126075162624 logical read bytes from cache
240440566773 table scan rows gotten
2632208820 session logical reads
2632206511 consistent gets
2632206511 consistent gets from cache
2632205708 consistent gets from cache (fastpath)
Step 3 - Next, I wanted to know the object ( table/index) against which
involving these objects, in the execution plan but didn't know whichview to query.
cause ( in this case, an unique index was dropped and Oracle was doing FTS
The above information could have saved us lot to time to identify the
on
a table which was referred 6 times in the query fetching million ofrecords).
checked?
So, my questions to the list is that which v$ view should I have
Or is there a better approach to troubleshoot such issues?--
Thanks
JM
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