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	<title>AskDba.org Weblog &#187; Performance</title>
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	<link>http://askdba.org/weblog</link>
	<description>Writing About Our Experiences With Oracle Databases</description>
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		<title>Sqlplus connection on AIX taking too long</title>
		<link>http://askdba.org/weblog/2009/09/sqlplus-connection-on-aix-taking-too-long/</link>
		<comments>http://askdba.org/weblog/2009/09/sqlplus-connection-on-aix-taking-too-long/#comments</comments>
		<pubDate>Wed, 23 Sep 2009 09:27:52 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[10g]]></category>
		<category><![CDATA[aix]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[Unix]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=678</guid>
		<description><![CDATA[Recently we faced a performance issue, where in sqlplus connection from application server A (AIX 5.3) to Database server DB (different physical server,10gR2 on AIX 5.3) was taking nearly 1-2 minutes.  We did some quick check&#8217;s to narrow down the problematic area.i.e Is it network or database server or some issue with application server? 1)Vmstat [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/09/sqlplus-connection-on-aix-taking-too-long/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>GATHER_STATS_JOB &#8211; Is it enabled?</title>
		<link>http://askdba.org/weblog/2009/08/gather_stats_job-is-it-enabled/</link>
		<comments>http://askdba.org/weblog/2009/08/gather_stats_job-is-it-enabled/#comments</comments>
		<pubDate>Tue, 18 Aug 2009 17:03:48 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[10g]]></category>
		<category><![CDATA[11g]]></category>
		<category><![CDATA[dbms_stats]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=515</guid>
		<description><![CDATA[Few days back , Martin had posted a series of post on a issue where GATHER_STATS_JOB was failing silently for a large object. If you have missed it, you can check following links Automated statistics gathering silently fails http://mwidlake.wordpress.com/2009/07/20/automated-statistics-gathering-silently-fails/ Automated Statistics Gathering Silently Fails #2 http://mwidlake.wordpress.com/2009/07/23/automated-statistics-gathering-silently-fails-2/ Automatic Statistics Gathering Fails #3   http://mwidlake.wordpress.com/2009/07/29/automatic-statistics-gathering-fails-3/ Automated statistics [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/08/gather_stats_job-is-it-enabled/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>Mview Complete Refresh and Atomic_refresh parameter</title>
		<link>http://askdba.org/weblog/2009/07/mview-complete-refresh-and-atomic_refresh-parameter/</link>
		<comments>http://askdba.org/weblog/2009/07/mview-complete-refresh-and-atomic_refresh-parameter/#comments</comments>
		<pubDate>Wed, 08 Jul 2009 17:48:48 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[10g]]></category>
		<category><![CDATA[9i]]></category>
		<category><![CDATA[mview]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[upgrade]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=500</guid>
		<description><![CDATA[This post discusses issue faced by me while working on Materialized view (mview) creation at new site(database). Starting Oracle 10g, how atomic_refresh works with complete refresh has undergone a change. Atomic_refresh parameter is to allow either all of the tasks of a transaction are performed or none of them (Atomicity). If set to TRUE, then [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/07/mview-complete-refresh-and-atomic_refresh-parameter/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>dbms_stats.copy_table_stats does not alter low/high value</title>
		<link>http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/</link>
		<comments>http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/#comments</comments>
		<pubDate>Wed, 24 Jun 2009 09:07:35 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[10.2.0.4]]></category>
		<category><![CDATA[11.1.0.7]]></category>
		<category><![CDATA[CBO]]></category>
		<category><![CDATA[dbms_stats]]></category>
		<category><![CDATA[partitioning]]></category>
		<category><![CDATA[statistics]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=496</guid>
		<description><![CDATA[I was working on a performance issue arising due to missing table stats on a new partition for large Partitioned table.This was a 10.2.0.4 database on IBM AIX 5L. So as to resolve the issue , I used dbms_stats.copy_table_stats to copy the stats to new parition from the previous partition. EXEC DBMS_STATS.COPY_TABLE_STATS (&#8216;owner&#8217;, &#8216;tabname&#8217;, &#8216;SourcePart&#8217;, [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/06/dbms_stats-copy_table_stats-does-not-alter-lowhigh-value/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
		</item>
		<item>
		<title>You Don&#8217;t need SysDBA privilege to run Awrrpt..</title>
		<link>http://askdba.org/weblog/2009/05/you-dont-need-sysdba-privilege-to-run-awrrpt/</link>
		<comments>http://askdba.org/weblog/2009/05/you-dont-need-sysdba-privilege-to-run-awrrpt/#comments</comments>
		<pubDate>Fri, 08 May 2009 18:34:11 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[10g]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=403</guid>
		<description><![CDATA[Well I tried to Sensationalize this post by using such a heading Though I just wanted to point out that Awrrpt script can be run without sysdba privilege too. Actually if you open awrrpti.sql script , it contains following line Rem NOTES Rem Run as SYSDBA. Generally this script should be invoked by awrrpt, Rem [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/05/you-dont-need-sysdba-privilege-to-run-awrrpt/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Connections to DataBase Hang Including &#8220;/ as sysdba&#8221;</title>
		<link>http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/</link>
		<comments>http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/#comments</comments>
		<pubDate>Tue, 07 Apr 2009 00:39:31 +0000</pubDate>
		<dc:creator>Saurabh Sood</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[10g]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[hang]]></category>
		<category><![CDATA[Hangs]]></category>
		<category><![CDATA[oracle 10g]]></category>
		<category><![CDATA[Unix]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=379</guid>
		<description><![CDATA[Recently I faced one issue where all the connection to database hung and it was also not possible to login to database using &#8220;/ as sysdba&#8221;. To get access of sqlplus I used the following syntax: $ sqlplus -prelim / as sysdba With &#8220;prelim&#8221; option we can run some commands which will help in collection [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Index Access best approach?? Not Always&#8230;</title>
		<link>http://askdba.org/weblog/2008/12/index-access-best-approach-not-always/</link>
		<comments>http://askdba.org/weblog/2008/12/index-access-best-approach-not-always/#comments</comments>
		<pubDate>Wed, 17 Dec 2008 00:47:36 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[9i]]></category>
		<category><![CDATA[index]]></category>
		<category><![CDATA[plan_table]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=298</guid>
		<description><![CDATA[There is a common misconception that Index access is the best access method for query execution. This approach leads to people concentrate on removing Full Table Scans (FTS) from the Query execution plan. I recently worked on a performance tuning issue where I found such scenario. Basically customer was trying to generate report for 3 [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2008/12/index-access-best-approach-not-always/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
		</item>
		<item>
		<title>11g New Feature: Database Replay</title>
		<link>http://askdba.org/weblog/2008/07/11g-new-feature-database-replay/</link>
		<comments>http://askdba.org/weblog/2008/07/11g-new-feature-database-replay/#comments</comments>
		<pubDate>Sat, 26 Jul 2008 12:48:24 +0000</pubDate>
		<dc:creator>Saurabh Sood</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[11g]]></category>

		<guid isPermaLink="false">http://askdba.org/weblog/?p=152</guid>
		<description><![CDATA[Database Replay: In critical production systems, before making changes to the environment( Hardware or software related), lots of testing is required in test systems to know the effect of those changes and this usually takes lots of time to test for the stability and effects of the change. In Oracle 11g this thing is simplified [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2008/07/11g-new-feature-database-replay/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Resolving Shutdown Immediate Hang Situations</title>
		<link>http://askdba.org/weblog/2008/05/shutdown-immediate-hang-2/</link>
		<comments>http://askdba.org/weblog/2008/05/shutdown-immediate-hang-2/#comments</comments>
		<pubDate>Mon, 26 May 2008 19:22:56 +0000</pubDate>
		<dc:creator>Saurabh Sood</dc:creator>
				<category><![CDATA[Featured]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[Hangs]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://askoracledba.wordpress.com/?p=44</guid>
		<description><![CDATA[Many times Oracle DBA&#8217;s are faced with a situation where shutting down the instance with shutdown immediate seems to take infinite time and gives a impression that the session is hung. In most of the cases this is not a hang. Hang can be defined as a scenario when few sessions/processes are waiting on some [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2008/05/shutdown-immediate-hang-2/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>Tracing Sessions with Event 10046</title>
		<link>http://askdba.org/weblog/2008/05/tracing-sessions-with-event-10046/</link>
		<comments>http://askdba.org/weblog/2008/05/tracing-sessions-with-event-10046/#comments</comments>
		<pubDate>Fri, 16 May 2008 19:37:05 +0000</pubDate>
		<dc:creator>Amit</dc:creator>
				<category><![CDATA[database]]></category>
		<category><![CDATA[oracle]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://askoracledba.wordpress.com/?p=25</guid>
		<description><![CDATA[10046 Event is used to trace SQL statements (similar to sql_trace=true) with additional details depending on the tracing level which is specified. 10046 EVENT levels: 1 &#8211; Enable standard SQL_TRACE functionality (Default) 4 &#8211; As Level 1 PLUS trace bind values 8 &#8211; As Level 1 PLUS trace waits 12 &#8211; As Level 1 PLUS [...]]]></description>
		<wfw:commentRss>http://askdba.org/weblog/2008/05/tracing-sessions-with-event-10046/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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