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	<title>The Pythian Blog &#187; tuning</title>
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		<title>UKOUG2011: e-Business Suite Concurrent Processing Performance Analysis</title>
		<link>http://www.pythian.com/news/29375/ukoug2011-e-business-suite-concurrent-processing-performance-analysis/</link>
		<comments>http://www.pythian.com/news/29375/ukoug2011-e-business-suite-concurrent-processing-performance-analysis/#comments</comments>
		<pubDate>Mon, 05 Dec 2011 15:42:04 +0000</pubDate>
		<dc:creator>Maris Elsins</dc:creator>
				<category><![CDATA[Oracle E-Business Suite]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[11i]]></category>
		<category><![CDATA[analysis]]></category>
		<category><![CDATA[EBS]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[R12]]></category>
		<category><![CDATA[tuning]]></category>
		<category><![CDATA[UKOUG]]></category>
		<category><![CDATA[UKOUG 2011]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=29375</guid>
		<description><![CDATA[Another December has started and you know what it means right? It’s the Christmas time? NO! It’s time for UKOUG Technology and e-Business Suite 2011 conference! There are not many things that can make a passionate Apps DBA more excited than that. UKOUG Tech &#38; eBS conferences are the only ones in Europe that have [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Database tuning:  ratio vs. rate</title>
		<link>http://www.pythian.com/news/9035/database-tuning-ratio-vs-rate/</link>
		<comments>http://www.pythian.com/news/9035/database-tuning-ratio-vs-rate/#comments</comments>
		<pubDate>Mon, 01 Mar 2010 16:00:00 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[mysqltuner]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[Pythian]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=9035</guid>
		<description><![CDATA[Baron makes an excellent point in Why you should ignore MySQL&#8217;s key cache hit ratio &#8212; ratio is not the same as rate. Furthermore, rate is [often] the important thing to look at. This is something that, at Pythian, we internalized a long time ago when thinking about MySQL tuning. In fact, mysqltuner 2.0 takes [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/9035/database-tuning-ratio-vs-rate/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>Pythian Offers Customized Training/Consulting Package</title>
		<link>http://www.pythian.com/news/2540/pythian-offers-customized-training/</link>
		<comments>http://www.pythian.com/news/2540/pythian-offers-customized-training/#comments</comments>
		<pubDate>Wed, 20 May 2009 17:28:52 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[Business Blog]]></category>
		<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Pythian]]></category>
		<category><![CDATA[audit]]></category>
		<category><![CDATA[auditing]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[dba]]></category>
		<category><![CDATA[enterprise]]></category>
		<category><![CDATA[optimize]]></category>
		<category><![CDATA[press release]]></category>
		<category><![CDATA[training]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=2540</guid>
		<description><![CDATA[Yesterday, The Pythian Group issued a press release about my book, Pythian&#8217;s partnership with Sun, and our new &#8220;MySQL Adoption Accelerator Package&#8221;. I am not a marketing guru, but I can tell you what we the package means in terms of new work that the MySQL teams have been doing. Basically, the MySQL Adoption Accelerator [...]]]></description>
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		<slash:comments>1</slash:comments>
		</item>
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		<title>What Exactly is Swappiness?</title>
		<link>http://www.pythian.com/news/1913/what-exactly-is-swappiness/</link>
		<comments>http://www.pythian.com/news/1913/what-exactly-is-swappiness/#comments</comments>
		<pubDate>Mon, 13 Apr 2009 18:44:33 +0000</pubDate>
		<dc:creator>Gerry Narvaja</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[PostgreSQL]]></category>
		<category><![CDATA[configuration]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[memory]]></category>
		<category><![CDATA[monitoring]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[piness]]></category>
		<category><![CDATA[sar]]></category>
		<category><![CDATA[sysstat]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=1913</guid>
		<description><![CDATA[This is an issue that keeps rearing its ugly head over and over again, and since it greatly affects performance, it is most important that DBAs of any DMBS running on Linux come to grips with it. So I decided to do some research and try different settings on my notebook. Here are my findings. [...]]]></description>
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		<slash:comments>6</slash:comments>
		</item>
		<item>
		<title>InnoDB logfiles</title>
		<link>http://www.pythian.com/news/1242/innodb-logfiles/</link>
		<comments>http://www.pythian.com/news/1242/innodb-logfiles/#comments</comments>
		<pubDate>Thu, 02 Oct 2008 00:10:48 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[InnoDB]]></category>
		<category><![CDATA[log]]></category>
		<category><![CDATA[redo]]></category>
		<category><![CDATA[server variables]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1242/innodb-logfiles</guid>
		<description><![CDATA[The unsung heroes of InnoDB are the logfiles. They are what makes InnoDB automatic crash recovery possible. Database administrators of other DBMS may be familiar with the concept of a &#8220;redo&#8221; log. When data is changed, affected data pages are changed in the innodb_buffer_pool. Then, the change is written to the redo log, which in [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1242/innodb-logfiles/feed/</wfw:commentRss>
		<slash:comments>12</slash:comments>
		</item>
		<item>
		<title>Consistent Gets not Necessarily the Best Way to Look at Query Performance</title>
		<link>http://www.pythian.com/news/1171/consistent-gets-not-necessarily-best-way-to-look-at-query-performance/</link>
		<comments>http://www.pythian.com/news/1171/consistent-gets-not-necessarily-best-way-to-look-at-query-performance/#comments</comments>
		<pubDate>Wed, 13 Aug 2008 13:56:12 +0000</pubDate>
		<dc:creator>Grégory Guillou</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Consistent Gets]]></category>
		<category><![CDATA[Hash Join]]></category>
		<category><![CDATA[Trust]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1171/consistent-gets-not-necessarily-best-way-to-look-at-query-performance</guid>
		<description><![CDATA[This post is for those who think Consistent Gets is the only thing that matters. It&#8217;s not. That&#8217;s why Statspack and AWR provide not only the top queries sorted by Consistent Gets but also Sorted by IO, CPU, Cluster Waits, and so on. I won&#8217;t argue. Check for yourself. I&#8217;ve run the queries that follow [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1171/consistent-gets-not-necessarily-best-way-to-look-at-query-performance/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Tuning Latch Contention: Cache-buffers-chain latches</title>
		<link>http://www.pythian.com/news/1135/tuning-latch-contention-cache-buffers-chain-latches/</link>
		<comments>http://www.pythian.com/news/1135/tuning-latch-contention-cache-buffers-chain-latches/#comments</comments>
		<pubDate>Fri, 25 Jul 2008 20:24:55 +0000</pubDate>
		<dc:creator>Riyaj Shamsudeen</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[buffer chain latches]]></category>
		<category><![CDATA[latch contention]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1135/tuning-latch-contention-cache-buffers-chain-latches</guid>
		<description><![CDATA[Recently, I had an opportunity to tune latch contention for cache buffers chain (CBC) latches. The problem was high CPU-usage combined with poor application performance. A quick review of the statspack report for 15 minutes showed a latch-free wait as the top event, consuming approximately 3600 seconds in an 8-CPU server. CPU usage was quite [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1135/tuning-latch-contention-cache-buffers-chain-latches/feed/</wfw:commentRss>
		<slash:comments>16</slash:comments>
		</item>
		<item>
		<title>Tuning &#8216;log file sync&#8217; Event Waits</title>
		<link>http://www.pythian.com/news/1098/tuning-log-file-sync-event-waits/</link>
		<comments>http://www.pythian.com/news/1098/tuning-log-file-sync-event-waits/#comments</comments>
		<pubDate>Fri, 27 Jun 2008 21:26:36 +0000</pubDate>
		<dc:creator>Riyaj Shamsudeen</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[LGWR]]></category>
		<category><![CDATA[log file sync]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[root cause analysis]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1098/tuning-log-file-sync-event-waits</guid>
		<description><![CDATA[In this blog entry, I will discuss strategies and techniques to resolve &#8216;log file sync&#8217; waits. This entry is intended to show an approach based upon scientific principles, not necessarily a step-by-step guide. Let&#8217;s understand how LGWR is inherent in implementing the commit mechanism first. Commit Mechanism and LGWR Internals At commit time, a process [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1098/tuning-log-file-sync-event-waits/feed/</wfw:commentRss>
		<slash:comments>19</slash:comments>
		</item>
		<item>
		<title>Welcome ASH Masters!</title>
		<link>http://www.pythian.com/news/1019/welcome-ash-masters/</link>
		<comments>http://www.pythian.com/news/1019/welcome-ash-masters/#comments</comments>
		<pubDate>Thu, 22 May 2008 02:27:44 +0000</pubDate>
		<dc:creator>Alex Gorbachev</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[ash]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[tuning]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/1019/welcome-ash-masters</guid>
		<description><![CDATA[Welcome ASH Masters! I have already mentioned about the excellent work that Kyle Hailey did around Active Session History (ASH). Kyle has also created ASHMON. The latest news &#8212; there is a new web site &#8212; ashmasters.com. This is the place where you can leave your comments and questions about ASH and ASHMON. Wondering how [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1019/welcome-ash-masters/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>EXPLAIN Cheatsheet</title>
		<link>http://www.pythian.com/news/960/explain-cheatsheet/</link>
		<comments>http://www.pythian.com/news/960/explain-cheatsheet/#comments</comments>
		<pubDate>Tue, 22 Apr 2008 16:21:30 +0000</pubDate>
		<dc:creator>Sheeri Cabral</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Non-Tech Articles]]></category>
		<category><![CDATA[cheatsheet]]></category>
		<category><![CDATA[explain]]></category>
		<category><![CDATA[guide]]></category>
		<category><![CDATA[optimization]]></category>
		<category><![CDATA[optimize]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[tuning]]></category>
		<category><![CDATA[tutorial]]></category>

		<guid isPermaLink="false">http://www.pythian.com/blogs/960/explain-cheatsheet</guid>
		<description><![CDATA[At the 2008 MySQL Conference and Expo, The Pythian Group gave away EXPLAIN cheatsheets. They were very nice, printed in full color and laminated to ensure you can spill your coffee* on it and it will survive. For those not at the conference, or those that want to make more, the file is downloadable as [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/960/explain-cheatsheet/feed/</wfw:commentRss>
		<slash:comments>10</slash:comments>
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