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	<title>Comments for Timur Akhmadeev&#039;s blog</title>
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	<link>http://timurakhmadeev.wordpress.com</link>
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	<item>
		<title>Comment on Fixed stats by v$lock &#124; Oracle Scratchpad</title>
		<link>http://timurakhmadeev.wordpress.com/2013/02/25/fixed-stats/#comment-1750</link>
		<dc:creator><![CDATA[v$lock &#124; Oracle Scratchpad]]></dc:creator>
		<pubDate>Thu, 02 May 2013 19:03:14 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=882#comment-1750</guid>
		<description><![CDATA[[...] to Timur Akhmadeev who recently published a note pointing out that you could collect stats on individual X$ tables. Do make sure you test this on [...]]]></description>
		<content:encoded><![CDATA[<p>[...] to Timur Akhmadeev who recently published a note pointing out that you could collect stats on individual X$ tables. Do make sure you test this on [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on System statistics poll by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2013/04/12/system-statistics-poll/#comment-1718</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Mon, 15 Apr 2013 09:05:30 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=899#comment-1718</guid>
		<description><![CDATA[Andreas,

thanks for the link.]]></description>
		<content:encoded><![CDATA[<p>Andreas,</p>
<p>thanks for the link.</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on System statistics poll by Latest data Industry news round up, Log Buffer #315</title>
		<link>http://timurakhmadeev.wordpress.com/2013/04/12/system-statistics-poll/#comment-1715</link>
		<dc:creator><![CDATA[Latest data Industry news round up, Log Buffer #315]]></dc:creator>
		<pubDate>Fri, 12 Apr 2013 12:51:07 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=899#comment-1715</guid>
		<description><![CDATA[[...] Recent thread in the OakTable mailing list prompted Timur Akhmadeev to create a poll and ask about the ways DBAs use system statistics in real systems. [...]]]></description>
		<content:encoded><![CDATA[<p>[...] Recent thread in the OakTable mailing list prompted Timur Akhmadeev to create a poll and ask about the ways DBAs use system statistics in real systems. [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on System statistics poll by Andreas</title>
		<link>http://timurakhmadeev.wordpress.com/2013/04/12/system-statistics-poll/#comment-1714</link>
		<dc:creator><![CDATA[Andreas]]></dc:creator>
		<pubDate>Fri, 12 Apr 2013 08:19:06 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=899#comment-1714</guid>
		<description><![CDATA[See also
http://structureddata.org/2008/01/02/what-are-your-system-statistics/]]></description>
		<content:encoded><![CDATA[<p>See also<br />
<a href="http://structureddata.org/2008/01/02/what-are-your-system-statistics/" rel="nofollow">http://structureddata.org/2008/01/02/what-are-your-system-statistics/</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Consultancy by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2012/06/13/consultancy/#comment-1706</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Tue, 02 Apr 2013 07:28:48 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=839#comment-1706</guid>
		<description><![CDATA[Link to a short &lt;a href=&quot;http://innovadevelopment.blog.com/2012/04/16/%D0%A1%D0%B5%D0%BC%D0%B8%D0%BD%D0%B0%D1%80-javaoracle/&quot; rel=&quot;nofollow&quot;&gt;review of the event (in Russian)&lt;/a&gt;]]></description>
		<content:encoded><![CDATA[<p>Link to a short <a href="http://innovadevelopment.blog.com/2012/04/16/%D0%A1%D0%B5%D0%BC%D0%B8%D0%BD%D0%B0%D1%80-javaoracle/" rel="nofollow">review of the event (in Russian)</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on OIC(A) again by Latest data Industry news round up, Log Buffer #312</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1697</link>
		<dc:creator><![CDATA[Latest data Industry news round up, Log Buffer #312]]></dc:creator>
		<pubDate>Fri, 22 Mar 2013 17:32:28 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1697</guid>
		<description><![CDATA[[...] Timur Akhmadeev produces yet another gem of a blog post. [...]]]></description>
		<content:encoded><![CDATA[<p>[...] Timur Akhmadeev produces yet another gem of a blog post. [...]</p>
]]></content:encoded>
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	<item>
		<title>Comment on OIC(A) again by Sayan Malakshinov</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1695</link>
		<dc:creator><![CDATA[Sayan Malakshinov]]></dc:creator>
		<pubDate>Fri, 22 Mar 2013 10:57:17 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1695</guid>
		<description><![CDATA[Hi, Timur!
Previously i made a typo: On 11.2.0.2 result is same as on 11.2.0.1. 
I see wrong behavior on 11.2.0.3 only. I sent spool by mail]]></description>
		<content:encoded><![CDATA[<p>Hi, Timur!<br />
Previously i made a typo: On 11.2.0.2 result is same as on 11.2.0.1.<br />
I see wrong behavior on 11.2.0.3 only. I sent spool by mail</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on OIC(A) again by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1694</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Fri, 22 Mar 2013 09:54:27 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1694</guid>
		<description><![CDATA[Hi Sayan

Thanks. Are you sure that 11.2.0.1 results are different from 11.2.0.2? I see exectly the same behavior in 11.2.0.2/3.
Can you post complete spool file of the test: https://www.dropbox.com/s/w1892c9b6woi0g1/oica_iot.sql]]></description>
		<content:encoded><![CDATA[<p>Hi Sayan</p>
<p>Thanks. Are you sure that 11.2.0.1 results are different from 11.2.0.2? I see exectly the same behavior in 11.2.0.2/3.<br />
Can you post complete spool file of the test: <a href="https://www.dropbox.com/s/w1892c9b6woi0g1/oica_iot.sql" rel="nofollow">https://www.dropbox.com/s/w1892c9b6woi0g1/oica_iot.sql</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on OIC(A) again by Sayan Malakshinov</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1693</link>
		<dc:creator><![CDATA[Sayan Malakshinov]]></dc:creator>
		<pubDate>Thu, 21 Mar 2013 20:06:57 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1693</guid>
		<description><![CDATA[On 11.2.0.2 result is same as on 11.2.0.3, so i think this problem was introduced in 11.2.0.3 only]]></description>
		<content:encoded><![CDATA[<p>On 11.2.0.2 result is same as on 11.2.0.3, so i think this problem was introduced in 11.2.0.3 only</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on OIC(A) again by Sayan Malakshinov</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1692</link>
		<dc:creator><![CDATA[Sayan Malakshinov]]></dc:creator>
		<pubDate>Thu, 21 Mar 2013 20:04:01 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1692</guid>
		<description><![CDATA[But on 11.2.0.1 results by default:
[sourcecode language=&quot;sql&quot;]

   OICA   OIC_0  OIC_10  OIC_20  OIC_30  OIC_40  OIC_50  OIC_60  OIC_70  OIC_80  OIC_90 OIC_100
------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- -------
    100   30582     255     226     198     170     142     113      85      57      29       1
     90   27524     230     203     178     153     128     102      77      51      26       1
     80   24466     204     181     158     136     114      90      68      46      23       1
     70   21407     179     158     139     119      99      79      60      40      20       1
     60   18349     153     136     119     102      85      68      51      34      17       1
     50   15291     128     113      99      85      71      57      43      29      15       1
     40   12233     102      90      79      68      57      45      34      23      12       1
     30    9175      77      68      59      51      43      34      26      17       9       1
     20    6116      51      45      40      34      28      23      17      11       6       1
     10    3058      26      23      20      17      14      11       9       6       3       1
      0       1       1       1       1       1       1       1       1       1       1       1
[/sourcecode]]]></description>
		<content:encoded><![CDATA[<p>But on 11.2.0.1 results by default:</p>
<pre class="brush: sql; title: ; notranslate">

   OICA   OIC_0  OIC_10  OIC_20  OIC_30  OIC_40  OIC_50  OIC_60  OIC_70  OIC_80  OIC_90 OIC_100
------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- -------
    100   30582     255     226     198     170     142     113      85      57      29       1
     90   27524     230     203     178     153     128     102      77      51      26       1
     80   24466     204     181     158     136     114      90      68      46      23       1
     70   21407     179     158     139     119      99      79      60      40      20       1
     60   18349     153     136     119     102      85      68      51      34      17       1
     50   15291     128     113      99      85      71      57      43      29      15       1
     40   12233     102      90      79      68      57      45      34      23      12       1
     30    9175      77      68      59      51      43      34      26      17       9       1
     20    6116      51      45      40      34      28      23      17      11       6       1
     10    3058      26      23      20      17      14      11       9       6       3       1
      0       1       1       1       1       1       1       1       1       1       1       1
</pre>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on OIC(A) again by Sayan Malakshinov</title>
		<link>http://timurakhmadeev.wordpress.com/2013/03/21/oica-again/#comment-1691</link>
		<dc:creator><![CDATA[Sayan Malakshinov]]></dc:creator>
		<pubDate>Thu, 21 Mar 2013 19:46:52 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=873#comment-1691</guid>
		<description><![CDATA[I just run this test on 11.2.0.3 with opt_param(&#039;_fix_control&#039; &#039;5236908:OFF&#039;)  and with alter session set &quot;_fix_control&quot;=&#039;5236908:ON&#039;, but it didn&#039;t help]]></description>
		<content:encoded><![CDATA[<p>I just run this test on 11.2.0.3 with opt_param(&#8216;_fix_control&#8217; &#8217;5236908:OFF&#8217;)  and with alter session set &#8220;_fix_control&#8221;=&#8217;5236908:ON&#8217;, but it didn&#8217;t help</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Obsolete cursors by 11.2: ожидание cursor: pin S wait on X при избыточной генерации курсоров параллельного выполнения &#124; Oracle mechanics</title>
		<link>http://timurakhmadeev.wordpress.com/2012/03/19/obsolete-cursors/#comment-1674</link>
		<dc:creator><![CDATA[11.2: ожидание cursor: pin S wait on X при избыточной генерации курсоров параллельного выполнения &#124; Oracle mechanics]]></dc:creator>
		<pubDate>Sat, 02 Mar 2013 10:36:31 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=801#comment-1674</guid>
		<description><![CDATA[[...] - интересным было только ярко выраженное верхнее ограничение количества дочерних курсоров на запрос, определяемое параметром _cursor_obsolete_threshold &#8211; см. Timur Akhmadeev. Obsolete cursors: [...]]]></description>
		<content:encoded><![CDATA[<p>[...] &#8211; интересным было только ярко выраженное верхнее ограничение количества дочерних курсоров на запрос, определяемое параметром _cursor_obsolete_threshold &#8211; см. Timur Akhmadeev. Obsolete cursors: [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on 16K CR gets for UQ index scan? Easy. Kind of. by Log Buffer #246, A Carnival of the Vanities for DBAs</title>
		<link>http://timurakhmadeev.wordpress.com/2011/11/17/16k-cr-gets-for-uq-index-scan-easy-kind-of/#comment-1673</link>
		<dc:creator><![CDATA[Log Buffer #246, A Carnival of the Vanities for DBAs]]></dc:creator>
		<pubDate>Fri, 01 Mar 2013 20:53:41 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=722#comment-1673</guid>
		<description><![CDATA[[...] Timur Akhmadeev wonders about 16K CR gets for UQ index scan? [...]]]></description>
		<content:encoded><![CDATA[<p>[...] Timur Akhmadeev wonders about 16K CR gets for UQ index scan? [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Fixed stats by Sayan Malakshinov</title>
		<link>http://timurakhmadeev.wordpress.com/2013/02/25/fixed-stats/#comment-1670</link>
		<dc:creator><![CDATA[Sayan Malakshinov]]></dc:creator>
		<pubDate>Mon, 25 Feb 2013 20:31:37 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=882#comment-1670</guid>
		<description><![CDATA[&gt;&gt; why Oracle made the choice to introduce a specific new procedure, 
&gt;&gt; without any parameters/configuration options if they could have 
&gt;&gt; better done it inside the standard procedure for statistics gathering?

Maybe, they did so for compatibility with previous versions. Also as we can gather stats on ordinary tables in maintenance period or on a small loads(except gtt), but for fixed objects would be better do it on usual load, so perhaps a calling same procedures but with different parameters and a calling different procedures do not differ greatly]]></description>
		<content:encoded><![CDATA[<p>&gt;&gt; why Oracle made the choice to introduce a specific new procedure,<br />
&gt;&gt; without any parameters/configuration options if they could have<br />
&gt;&gt; better done it inside the standard procedure for statistics gathering?</p>
<p>Maybe, they did so for compatibility with previous versions. Also as we can gather stats on ordinary tables in maintenance period or on a small loads(except gtt), but for fixed objects would be better do it on usual load, so perhaps a calling same procedures but with different parameters and a calling different procedures do not differ greatly</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on CBO isn&#8217;t perfect by Log Buffer #247, A Carnival of the Vanities for DBAs</title>
		<link>http://timurakhmadeev.wordpress.com/2011/11/21/cbo-isnt-perfect/#comment-1669</link>
		<dc:creator><![CDATA[Log Buffer #247, A Carnival of the Vanities for DBAs]]></dc:creator>
		<pubDate>Wed, 13 Feb 2013 17:08:33 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=729#comment-1669</guid>
		<description><![CDATA[[...] CBO isn’t perfect, and you should remember that. [...]]]></description>
		<content:encoded><![CDATA[<p>[...] CBO isn’t perfect, and you should remember that. [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on RuOUG in Saint Petersburg by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2012/02/15/ruoug-in-saint-petersburg/#comment-1668</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Tue, 12 Feb 2013 06:42:34 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=769#comment-1668</guid>
		<description><![CDATA[Hi,

you can check how Statspack captures this information on the higher snapshot levels, but I have a feeling it doesn&#039;t capture predicates as well.

If you really need predicates section, try to reproduce the plan with EXPLAIN PLAN, outline and binds sections of the plan from AWR.

The bug should be fixed in 12c and I think they ought to include it in 11.2.0.4 (I hope so).]]></description>
		<content:encoded><![CDATA[<p>Hi,</p>
<p>you can check how Statspack captures this information on the higher snapshot levels, but I have a feeling it doesn&#8217;t capture predicates as well.</p>
<p>If you really need predicates section, try to reproduce the plan with EXPLAIN PLAN, outline and binds sections of the plan from AWR.</p>
<p>The bug should be fixed in 12c and I think they ought to include it in 11.2.0.4 (I hope so).</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on RuOUG in Saint Petersburg by bhavin</title>
		<link>http://timurakhmadeev.wordpress.com/2012/02/15/ruoug-in-saint-petersburg/#comment-1667</link>
		<dc:creator><![CDATA[bhavin]]></dc:creator>
		<pubDate>Tue, 12 Feb 2013 00:23:48 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=769#comment-1667</guid>
		<description><![CDATA[◦the function dbms_xplan.display_awr to display execution plan stored in AWR is not working correctly – it misses predicates information even in 11.2.0.3. Major gap.

-- Is there any alternative to get this details?]]></description>
		<content:encoded><![CDATA[<p>◦the function dbms_xplan.display_awr to display execution plan stored in AWR is not working correctly – it misses predicates information even in 11.2.0.3. Major gap.</p>
<p>&#8211; Is there any alternative to get this details?</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on EXPLAIN PLAN shared memory by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2011/11/24/explain-plan-shared-memory/#comment-1662</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Thu, 17 Jan 2013 03:26:40 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=734#comment-1662</guid>
		<description><![CDATA[That is wrong, I checked memory of the last executed statement which is not what&#039;s needed. Here&#039;s the right version &amp; output:
[sourcecode lang=&quot;sql&quot;]
set serveroutput off
col uq_id new_value uq_id
select to_char(sysdate, &#039;YYYYMMDDHH24MISS&#039;) uq_id from dual;

select /*+ &amp;uq_id */ count(*) from dual;

select sharable_mem, typecheck_mem
  from v$sql 
 where sql_id = (select s.prev_sql_id from v$session s where sid = userenv(&#039;sid&#039;))
   and child_number = (select s.prev_child_number from v$session s where sid = userenv(&#039;sid&#039;));

explain plan for select /*+ &amp;uq_id */ count(*) from dual;

col prev_sql_id new_value sql_id
col prev_child_number new_value child_number

select s.prev_sql_id, prev_child_number from v$session s where sid = userenv(&#039;sid&#039;);

select sharable_mem, typecheck_mem
  from v$sql 
 where sql_id = &#039;&amp;sql_id&#039;
   and child_number = &amp;child_number;
[/sourcecode]
[sourcecode]
SQL&gt; @tc\xplan_shared_mem

UQ_ID
--------------
20130117072128


            COUNT(*)
--------------------
                   1


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               15624                    0


Explained.


PREV_SQL_ID      PREV_CHILD_NUMBER
------------- --------------------
65mhg515qht3d                    0


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600
[/sourcecode]]]></description>
		<content:encoded><![CDATA[<p>That is wrong, I checked memory of the last executed statement which is not what&#8217;s needed. Here&#8217;s the right version &amp; output:</p>
<pre class="brush: sql; title: ; notranslate">
set serveroutput off
col uq_id new_value uq_id
select to_char(sysdate, 'YYYYMMDDHH24MISS') uq_id from dual;

select /*+ &amp;uq_id */ count(*) from dual;

select sharable_mem, typecheck_mem
  from v$sql 
 where sql_id = (select s.prev_sql_id from v$session s where sid = userenv('sid'))
   and child_number = (select s.prev_child_number from v$session s where sid = userenv('sid'));

explain plan for select /*+ &amp;uq_id */ count(*) from dual;

col prev_sql_id new_value sql_id
col prev_child_number new_value child_number

select s.prev_sql_id, prev_child_number from v$session s where sid = userenv('sid');

select sharable_mem, typecheck_mem
  from v$sql 
 where sql_id = '&amp;sql_id'
   and child_number = &amp;child_number;
</pre>
<pre class="brush: plain; title: ; notranslate">
SQL&gt; @tc\xplan_shared_mem

UQ_ID
--------------
20130117072128


            COUNT(*)
--------------------
                   1


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               15624                    0


Explained.


PREV_SQL_ID      PREV_CHILD_NUMBER
------------- --------------------
65mhg515qht3d                    0


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600
</pre>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on EXPLAIN PLAN shared memory by Timur Akhmadeev</title>
		<link>http://timurakhmadeev.wordpress.com/2011/11/24/explain-plan-shared-memory/#comment-1661</link>
		<dc:creator><![CDATA[Timur Akhmadeev]]></dc:creator>
		<pubDate>Thu, 17 Jan 2013 03:06:18 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=734#comment-1661</guid>
		<description><![CDATA[Hi Tanel,

thanks for stopping by!
Yes, indeed TYPECHECK_MEM shows missing 90K+ of memory. It&#039;s nice to know that it is accounted somehow, although not very conveniently I must say.
Another thing that I&#039;ve noticed when I run modified script - if I re-check TYPECHECK_MEM after some inactivity time, it goes to zero (this looks promising - probably the TYPECHECK part is abandoned quickly), but also SHARABLE_MEM increases a bit from 36K to 56K:
[sourcecode lang=&quot;sql&quot;]
        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               15624                    0


Explained.


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               56418                    0

[/sourcecode]]]></description>
		<content:encoded><![CDATA[<p>Hi Tanel,</p>
<p>thanks for stopping by!<br />
Yes, indeed TYPECHECK_MEM shows missing 90K+ of memory. It&#8217;s nice to know that it is accounted somehow, although not very conveniently I must say.<br />
Another thing that I&#8217;ve noticed when I run modified script &#8211; if I re-check TYPECHECK_MEM after some inactivity time, it goes to zero (this looks promising &#8211; probably the TYPECHECK part is abandoned quickly), but also SHARABLE_MEM increases a bit from 36K to 56K:</p>
<pre class="brush: sql; title: ; notranslate">
        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               15624                    0


Explained.


        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               36905                96600

SQL&gt; /

        SHARABLE_MEM        TYPECHECK_MEM
-------------------- --------------------
               56418                    0

</pre>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on EXPLAIN PLAN shared memory by What the heck is the INTERNAL_FUNCTION in execution plan predicate section? &#124; Tanel Poder&#039;s blog: IT &#38; Mobile for Geeks and Pros</title>
		<link>http://timurakhmadeev.wordpress.com/2011/11/24/explain-plan-shared-memory/#comment-1660</link>
		<dc:creator><![CDATA[What the heck is the INTERNAL_FUNCTION in execution plan predicate section? &#124; Tanel Poder&#039;s blog: IT &#38; Mobile for Geeks and Pros]]></dc:creator>
		<pubDate>Thu, 17 Jan 2013 00:41:22 +0000</pubDate>
		<guid isPermaLink="false">http://timurakhmadeev.wordpress.com/?p=734#comment-1660</guid>
		<description><![CDATA[[...] given SQL again, in a special, more instrumented way, it has more information at hand apparently (and it uses more memory too). Or it could just be that whoever wrote V$SQL_PLAN, didn&#8217;t write the piece of code for [...]]]></description>
		<content:encoded><![CDATA[<p>[...] given SQL again, in a special, more instrumented way, it has more information at hand apparently (and it uses more memory too). Or it could just be that whoever wrote V$SQL_PLAN, didn&#8217;t write the piece of code for [...]</p>
]]></content:encoded>
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