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	<title>Comments for blog.gerwinhendriksen.com</title>
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	<link>http://blog.gerwinhendriksen.com</link>
	<description>Home of General Approach Performance Profiling (GAPP)</description>
	<pubDate>Thu, 09 Sep 2010 08:13:27 +0000</pubDate>
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		<title>Comment on The Oracle Database Buffer Cache should it be bigger… by bob</title>
		<link>http://blog.gerwinhendriksen.com/?p=78#comment-3292</link>
		<dc:creator>bob</dc:creator>
		<pubDate>Wed, 18 Aug 2010 19:14:45 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=78#comment-3292</guid>
		<description>I have always set the unix buffer to near zero on all my oracle servers...Double buffering is always a problem...Raw IO or close to it is the way to go with oracle on Unix.
It also is important that oracle buffers be set properly based on what kind of load your putting on the system...A data warehouse for instance mostly always benefits from a large DB cache where an OLTP system my suffer due to dirty blocks...

All in all Nice read though...Thanks...</description>
		<content:encoded><![CDATA[<p>I have always set the unix buffer to near zero on all my oracle servers&#8230;Double buffering is always a problem&#8230;Raw IO or close to it is the way to go with oracle on Unix.<br />
It also is important that oracle buffers be set properly based on what kind of load your putting on the system&#8230;A data warehouse for instance mostly always benefits from a large DB cache where an OLTP system my suffer due to dirty blocks&#8230;</p>
<p>All in all Nice read though&#8230;Thanks&#8230;</p>
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		<title>Comment on How to change an outerjoin query to one without by Blogroll Report 11/12/2009-18/12/2009 &#171; Coskan&#8217;s Approach to Oracle</title>
		<link>http://blog.gerwinhendriksen.com/?p=182#comment-751</link>
		<dc:creator>Blogroll Report 11/12/2009-18/12/2009 &#171; Coskan&#8217;s Approach to Oracle</dc:creator>
		<pubDate>Sat, 02 Jan 2010 17:50:27 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=182#comment-751</guid>
		<description>[...] 12-How to tune slow outer join by replacing with faster union and analytic functions Gerwin Hendriksen-How to change an outerjoin query to one without [...]</description>
		<content:encoded><![CDATA[<p>[...] 12-How to tune slow outer join by replacing with faster union and analytic functions Gerwin Hendriksen-How to change an outerjoin query to one without [...]</p>
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		<title>Comment on ORA-01422 while drop table (even DUAL looks fine) by Gerwin</title>
		<link>http://blog.gerwinhendriksen.com/?p=173#comment-735</link>
		<dc:creator>Gerwin</dc:creator>
		<pubDate>Mon, 28 Dec 2009 11:03:08 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=173#comment-735</guid>
		<description>Hi Coskan,

Thank you for your comment. I didn't do the 10046 trace myself, but probably I try to do it soon and post the results here.

It surprised me that there is such a difference between versions. Anyway any comments are welcome.

Regards, Gerwin</description>
		<content:encoded><![CDATA[<p>Hi Coskan,</p>
<p>Thank you for your comment. I didn&#8217;t do the 10046 trace myself, but probably I try to do it soon and post the results here.</p>
<p>It surprised me that there is such a difference between versions. Anyway any comments are welcome.</p>
<p>Regards, Gerwin</p>
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		<title>Comment on ORA-01422 while drop table (even DUAL looks fine) by Coskan</title>
		<link>http://blog.gerwinhendriksen.com/?p=173#comment-733</link>
		<dc:creator>Coskan</dc:creator>
		<pubDate>Sun, 27 Dec 2009 19:17:39 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=173#comment-733</guid>
		<description>Hi Gerwin,

If you check the table itself by create test_dual as select * from dual  you will see added rows in both versions of Oracle (11GR1 11GR2) but when you do 10046 trace, you will see that   steps before dropping table on 11GR2  are different than versions before 11GR2.  Looks like Oracle changed the logic.</description>
		<content:encoded><![CDATA[<p>Hi Gerwin,</p>
<p>If you check the table itself by create test_dual as select * from dual  you will see added rows in both versions of Oracle (11GR1 11GR2) but when you do 10046 trace, you will see that   steps before dropping table on 11GR2  are different than versions before 11GR2.  Looks like Oracle changed the logic.</p>
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		<title>Comment on ORA-01422 while drop table (even DUAL looks fine) by Gerwin</title>
		<link>http://blog.gerwinhendriksen.com/?p=173#comment-695</link>
		<dc:creator>Gerwin</dc:creator>
		<pubDate>Tue, 15 Dec 2009 12:46:39 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=173#comment-695</guid>
		<description>Surachart, thanks for your response. I have done some block dumps on the dual table itself and I saw still some evidence ot the records in the first data block of the table:

block_row_dump:
tab 0, row 0, @0x1f9b
tl: 5 fb: --H-FL-- lb: 0x1  cc: 1
col  0: [ 1]  58
tab 0, row 1, @0x1f96
tl: 5 fb: --H-FL-- lb: 0x2  cc: 1
col  0: [ 1]  41
end_of_block_dump

When checking the values:
select chr(88) from dual; --&gt; X -- hex 58 (first row)
select chr(65) from dual; --&gt; A  -- hex 41 (second row)

I think, it might be very interesting what is in the blocks of the 11GR2 database. I would like to know if the insert is not done or that it does something else.

Regards, Gerwin</description>
		<content:encoded><![CDATA[<p>Surachart, thanks for your response. I have done some block dumps on the dual table itself and I saw still some evidence ot the records in the first data block of the table:</p>
<p>block_row_dump:<br />
tab 0, row 0, @0&#215;1f9b<br />
tl: 5 fb: &#8211;H-FL&#8211; lb: 0&#215;1  cc: 1<br />
col  0: [ 1]  58<br />
tab 0, row 1, @0&#215;1f96<br />
tl: 5 fb: &#8211;H-FL&#8211; lb: 0&#215;2  cc: 1<br />
col  0: [ 1]  41<br />
end_of_block_dump</p>
<p>When checking the values:<br />
select chr(88) from dual; &#8211;> X &#8212; hex 58 (first row)<br />
select chr(65) from dual; &#8211;> A  &#8212; hex 41 (second row)</p>
<p>I think, it might be very interesting what is in the blocks of the 11GR2 database. I would like to know if the insert is not done or that it does something else.</p>
<p>Regards, Gerwin</p>
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		<title>Comment on ORA-01422 while drop table (even DUAL looks fine) by Surachart Opun</title>
		<link>http://blog.gerwinhendriksen.com/?p=173#comment-694</link>
		<dc:creator>Surachart Opun</dc:creator>
		<pubDate>Tue, 15 Dec 2009 04:52:06 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=173#comment-694</guid>
		<description>thank you for good example...
It's a bug, isn't it?

I tested on 11gR2 ,,, no error...

11gR1:
 
SQL&#62; insert into dual values ('A');

1 row created.

SQL&#62; drop table xxx;
drop table xxx
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-01422: exact fetch returns more than requested number of rows

11gR2:
  
SQL&#62; insert into dual values ('A');

1 row created.

SQL&#62; select * from dual;

D
-
X

SQL&#62; drop table xxx;

Table dropped.</description>
		<content:encoded><![CDATA[<p>thank you for good example&#8230;<br />
It&#8217;s a bug, isn&#8217;t it?</p>
<p>I tested on 11gR2 ,,, no error&#8230;</p>
<p>11gR1:</p>
<p>SQL&gt; insert into dual values (&#8217;A');</p>
<p>1 row created.</p>
<p>SQL&gt; drop table xxx;<br />
drop table xxx<br />
*<br />
ERROR at line 1:<br />
ORA-00604: error occurred at recursive SQL level 1<br />
ORA-01422: exact fetch returns more than requested number of rows</p>
<p>11gR2:</p>
<p>SQL&gt; insert into dual values (&#8217;A');</p>
<p>1 row created.</p>
<p>SQL&gt; select * from dual;</p>
<p>D<br />
-<br />
X</p>
<p>SQL&gt; drop table xxx;</p>
<p>Table dropped.</p>
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		<title>Comment on SQL Tracing in Self Service Applications (CRM) within Oracle Applications 11i by Logan 5</title>
		<link>http://blog.gerwinhendriksen.com/?p=158#comment-470</link>
		<dc:creator>Logan 5</dc:creator>
		<pubDate>Thu, 20 Aug 2009 19:13:01 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=158#comment-470</guid>
		<description>Awsomeness. Thank you.

Is there anyway from SQL to monitor the use of Self Service? For example, fnd_login_responsibilities  only tracks form responsibility logins in 11.5.10.2.

Thanks again.
Logan 5</description>
		<content:encoded><![CDATA[<p>Awsomeness. Thank you.</p>
<p>Is there anyway from SQL to monitor the use of Self Service? For example, fnd_login_responsibilities  only tracks form responsibility logins in 11.5.10.2.</p>
<p>Thanks again.<br />
Logan 5</p>
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		<title>Comment on The Oracle Database Buffer Cache should it be bigger… by Marco Gralike</title>
		<link>http://blog.gerwinhendriksen.com/?p=78#comment-9</link>
		<dc:creator>Marco Gralike</dc:creator>
		<pubDate>Wed, 08 Oct 2008 22:23:28 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=78#comment-9</guid>
		<description>Nice read!

What blog virus did you refer to 8-)

LOL</description>
		<content:encoded><![CDATA[<p>Nice read!</p>
<p>What blog virus did you refer to <img src='http://blog.gerwinhendriksen.com/wp-includes/images/smilies/icon_cool.gif' alt='8-)' class='wp-smiley' /> </p>
<p>LOL</p>
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		<title>Comment on How to get easily all hidden init.ora parameters in 11G by Gerwin</title>
		<link>http://blog.gerwinhendriksen.com/?p=63#comment-8</link>
		<dc:creator>Gerwin</dc:creator>
		<pubDate>Tue, 07 Oct 2008 18:23:08 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=63#comment-8</guid>
		<description>Hi Marco, yes that was something I was surprised of as well. The parameters spooled in the post are just the default set parameters for a 11.1.0.6 database installation. It might be interesting to further investigate what these default set underscore parameters are exactly tweaking. For now it looks like that most of them are influencing the cost based optimizer.</description>
		<content:encoded><![CDATA[<p>Hi Marco, yes that was something I was surprised of as well. The parameters spooled in the post are just the default set parameters for a 11.1.0.6 database installation. It might be interesting to further investigate what these default set underscore parameters are exactly tweaking. For now it looks like that most of them are influencing the cost based optimizer.</p>
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		<title>Comment on How to get easily all hidden init.ora parameters in 11G by Marco Gralike</title>
		<link>http://blog.gerwinhendriksen.com/?p=63#comment-7</link>
		<dc:creator>Marco Gralike</dc:creator>
		<pubDate>Tue, 07 Oct 2008 15:18:41 +0000</pubDate>
		<guid isPermaLink="false">http://blog.gerwinhendriksen.com/?p=63#comment-7</guid>
		<description>It startled me how much hidden parameters are set nowadays.......

:-(</description>
		<content:encoded><![CDATA[<p>It startled me how much hidden parameters are set nowadays&#8230;&#8230;.</p>
<p> <img src='http://blog.gerwinhendriksen.com/wp-includes/images/smilies/icon_sad.gif' alt=':-(' class='wp-smiley' /></p>
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