Comments for Oracloid Blog http://www.oracloid.com The Alex Gorbachev Oracle Blog Wed, 10 Mar 2010 05:43:00 +0000 http://wordpress.org/?v=2.5.1 Comment on Bind Variable Peeking with no Histograms by Mike http://www.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-57550 Mike Mon, 21 Dec 2009 20:51:12 +0000 http://blog.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-57550 <a href="#comment-55499" rel="nofollow">@Alex Gorbachev </a> method_opt => 'FOR COLUMNS' will collect statistics without any histograms (dba_tab_histograms will show no rows) @Alex Gorbachev
method_opt => ‘FOR COLUMNS’ will collect statistics without any histograms (dba_tab_histograms will show no rows)

]]> Comment on Bind Variable Peeking with no Histograms by Alex Gorbachev http://www.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-55499 Alex Gorbachev Thu, 22 Oct 2009 18:05:10 +0000 http://blog.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-55499 Jose, please be aware that there is no option to disable histogram (unless you can point me on it) and the way to collect statistics without histograms is to use "SIZE 1". Thanks for you comment. Jose, please be aware that there is no option to disable histogram (unless you can point me on it) and the way to collect statistics without histograms is to use “SIZE 1″.

Thanks for you comment.

]]> Comment on Bind Variable Peeking with no Histograms by Jose http://www.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-55498 Jose Thu, 22 Oct 2009 17:57:21 +0000 http://blog.oracloid.com/2006/07/bind-variable-peeking-with-no-histograms/#comment-55498 I don't understand your example You are using histograms because you use: method_opt => ‘FOR ALL COLUMNS SIZE 1‘ You are using a histogram with one bucket. If you don't want to use histograms why do you include this clause? I think that you must do the example with histograms disabled. You can't prove that peeking with no histograms happens if you are using histograms I don’t understand your example
You are using histograms because you use: method_opt => ‘FOR ALL COLUMNS SIZE 1‘

You are using a histogram with one bucket.

If you don’t want to use histograms why do you include this clause?

I think that you must do the example with histograms disabled. You can’t prove
that peeking with no histograms happens if you are using histograms

]]> Comment on Closing trace file with ORADEBUG by shailender http://www.oracloid.com/2006/05/closing-trace-file-with-oradebug/#comment-49572 shailender Wed, 08 Jul 2009 15:45:46 +0000 http://blog.oracloid.com/?p=4#comment-49572 We have a cron job that deletes all files older than 7 days. Some times it is deleting background process trace files as well. So I am in the process of applying "oradebug close_trace" on all BG proces in the instance. In such a case, what will be the impact on those ones where there is a trace file available (not deleted by the cron job)? I tried it on one of my test systems, on LMD process, and found that it made a entry in the existing trace file. Not sure what will happen next. Any body tested this scenario? *** 2009-07-07 22:07:51.182 End DRM(910) for pkey transfer request(s) from 1 *** 2009-07-08 15:36:25.284 Received ORADEBUG command 'close_trace' from process Unix process pid: 15348, image: We have a cron job that deletes all files older than 7 days. Some times it is deleting background process trace files as well. So I am in the process of applying “oradebug close_trace” on all BG proces in the instance. In such a case, what will be the impact on those ones where there is a trace file available (not deleted by the cron job)?

I tried it on one of my test systems, on LMD process, and found that it made a entry in the existing trace file. Not sure what will happen next. Any body tested this scenario?

*** 2009-07-07 22:07:51.182
End DRM(910) for pkey transfer request(s) from 1
*** 2009-07-08 15:36:25.284
Received ORADEBUG command ‘close_trace’ from process Unix process pid: 15348, image:

]]> Comment on Server-side FAN callouts by Alex Gorbachev http://www.oracloid.com/2006/05/server-side-fan-callouts/#comment-42922 Alex Gorbachev Wed, 29 Apr 2009 22:25:21 +0000 http://blog.oracloid.com/?p=13#comment-42922 jc, This is Perl question and I'm far from Perl guru. :) See http://perldoc.perl.org/functions/require.html and http://perldoc.perl.org/perlvar.html#@INC I would be very careful accessing the database from callouts. At least, I assume that the database is external to this cluster, otherwise, there is clearly condition when database is not available. One good options would be to write events in the file and plug it into the DB as external table. Another idea would be to write events in a file and have another asyncronous process moving them into the DB. Cheers, Alex jc,

This is Perl question and I’m far from Perl guru. :) See http://perldoc.perl.org/functions/require.html and http://perldoc.perl.org/perlvar.html#@INC

I would be very careful accessing the database from callouts. At least, I assume that the database is external to this cluster, otherwise, there is clearly condition when database is not available.

One good options would be to write events in the file and plug it into the DB as external table.
Another idea would be to write events in a file and have another asyncronous process moving them into the DB.

Cheers,
Alex

]]> Comment on Server-side FAN callouts by jc http://www.oracloid.com/2006/05/server-side-fan-callouts/#comment-42891 jc Wed, 29 Apr 2009 15:42:12 +0000 http://blog.oracloid.com/?p=13#comment-42891 Alex, I am using Perl scripts for the callouts in our environment. I am not touching the database and not using any DBI modules. So far so good. Now, there's a requirement for us to log every event into a database table. I would like to use the DBI that comes with the perl associated with Oracle installation (ORACLE_HOME/perl/bin) How do I 'include' that module in my current program? The thing with the dynamic libraries called out by the perl interpretor is determined by LD_LIBRARY_PATH. So, I am left with invoking a shell callout that exports these variables and in turn invokes the perl code. Is that my only option? ??????? Alex,
I am using Perl scripts for the callouts in our environment.
I am not touching the database and not using any DBI modules. So far so good.

Now, there’s a requirement for us to log every event into a database table.
I would like to use the DBI that comes with the perl associated with Oracle installation (ORACLE_HOME/perl/bin)

How do I ‘include’ that module in my current program?
The thing with the dynamic libraries called out by the perl interpretor is determined by LD_LIBRARY_PATH.

So, I am left with invoking a shell callout that exports these variables and in turn invokes the perl code.
Is that my only option?

???????

]]> Comment on Moving to Canada… Oracle 10g RAC + Solaris 10g + VMware by Punam http://www.oracloid.com/2006/07/moving-to-canada-oracle-10g-rac-solaris-10g-vmware/#comment-40073 Punam Tue, 07 Apr 2009 21:42:35 +0000 http://blog.oracloid.com/2006/07/moving-to-canada-oracle-10g-rac-solaris-10g-vmware/#comment-40073 Visit http://www.oracleracsig.org for Oracle 10g RAC on solaris Visit http://www.oracleracsig.org for Oracle 10g RAC on solaris

]]> Comment on Extending Oracle Enterprise Manager 10g - Article by Pythian Group - Blog http://www.oracloid.com/2006/06/extending-oracle-enterprise-manager-10g-article/#comment-36931 Pythian Group - Blog Tue, 10 Mar 2009 17:53:23 +0000 http://blog.oracloid.com/2006/06/extending-oracle-enterprise-manager-10g-article/#comment-36931 [...] been a while since I first started to work on this, first as part of the Grid Control Extensibility article that I wrote for IOUG SELECT Magazine in 2006 (thanks to John Kanagaraj for encouraging me to write [...] [...] been a while since I first started to work on this, first as part of the Grid Control Extensibility article that I wrote for IOUG SELECT Magazine in 2006 (thanks to John Kanagaraj for encouraging me to write [...]

]]> Comment on Server-side FAN callouts by Alex Gorbachev http://www.oracloid.com/2006/05/server-side-fan-callouts/#comment-36396 Alex Gorbachev Wed, 04 Mar 2009 10:58:06 +0000 http://blog.oracloid.com/?p=13#comment-36396 Nehal, This is very RTFM question. You can find <a href="http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/hafeats.htm#BABECAFD" rel="nofollow">more info about FAN Events here</a>. Good Luck! Nehal,

This is very RTFM question. You can find more info about FAN Events here.

Good Luck!

]]> Comment on Server-side FAN callouts by nehal http://www.oracloid.com/2006/05/server-side-fan-callouts/#comment-36391 nehal Wed, 04 Mar 2009 10:33:16 +0000 http://blog.oracloid.com/?p=13#comment-36391 what is this FAN exactly and when it triggers? what is this FAN exactly and when it triggers?

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