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	<title>The Pythian Blog &#187; Christo Kutrovsky</title>
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		<title>Solaris 11 &#8211; First Impressions as Storage Server</title>
		<link>http://www.pythian.com/news/28579/solaris-11-first-impressions-as-storage-server/</link>
		<comments>http://www.pythian.com/news/28579/solaris-11-first-impressions-as-storage-server/#comments</comments>
		<pubDate>Thu, 17 Nov 2011 19:20:25 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Solaris]]></category>
		<category><![CDATA[storage]]></category>
		<category><![CDATA[zfs]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=28579</guid>
		<description><![CDATA[Solaris 11 has been release a few days ago. I was anxious to upgrade as I was using Solaris Express 2010.11 for some time and I was hitting a couple of bugs. One was a nasty IP layer bug (BAD TRAP: type=e (#pf Page fault) rp=ffffff005c9b1040 addr=20 occurred in module &#8220;ip&#8221; due to a NULL [...]]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>What&#8217;s in your Exadata Smart Flash Cache?</title>
		<link>http://www.pythian.com/news/19907/whats-in-your-exadata-smart-flash-cache/</link>
		<comments>http://www.pythian.com/news/19907/whats-in-your-exadata-smart-flash-cache/#comments</comments>
		<pubDate>Thu, 21 Apr 2011 18:27:38 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Exadata]]></category>
		<category><![CDATA[Pythian]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[11g]]></category>
		<category><![CDATA[cell cache]]></category>
		<category><![CDATA[downloads]]></category>
		<category><![CDATA[exadata]]></category>
		<category><![CDATA[flash cache]]></category>
		<category><![CDATA[software]]></category>
		<category><![CDATA[tool]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=19907</guid>
		<description><![CDATA[One of the exclusive Exadata features is the Smart Flash Cache (Oracle White Paper PDF). On a full rack, there is 5 TB of flash cache, which can store a significant amount of data. Quite often it&#8217;s several times more than the working set for a given reporting system. What&#8217;s so cool about the Exadata [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/19907/whats-in-your-exadata-smart-flash-cache/feed/</wfw:commentRss>
		<slash:comments>11</slash:comments>
		</item>
		<item>
		<title>UKOUG 2010 &#8211; 2 Days Later</title>
		<link>http://www.pythian.com/news/18757/ukoug-2010-2-days-later/</link>
		<comments>http://www.pythian.com/news/18757/ukoug-2010-2-days-later/#comments</comments>
		<pubDate>Tue, 30 Nov 2010 18:30:00 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Pythian]]></category>
		<category><![CDATA[Pythian Appearances]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[conference]]></category>
		<category><![CDATA[Liveblogging]]></category>
		<category><![CDATA[UKOUG]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=18757</guid>
		<description><![CDATA[Blogging from the Speaker Ready room which is now suited on the balcony overlooking the exhibition. I must say that I like the new location. Not only it is closer to the action, but allows you to oversee who is hanging out over the exhibitors. There&#8217;s been a number of interesting sessions, but it&#8217;s little [...]]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Correction on Storage Index blog</title>
		<link>http://www.pythian.com/news/16539/correction-on-storage-index-blog/</link>
		<comments>http://www.pythian.com/news/16539/correction-on-storage-index-blog/#comments</comments>
		<pubDate>Mon, 13 Sep 2010 22:08:22 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Exadata]]></category>
		<category><![CDATA[Technical Blog]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=16539</guid>
		<description><![CDATA[This is just a quick post to note that I&#8217;ve corrected my blog on Storage Indexes here, after a follow up blog from Kerry Osborne indicating an error on my part. Storage Indexes DO work with bind variables, but the implicit convertion works differently. Thanks Kerry! This post will be removed in 2 weeks.]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Oracle Exadata HCC (Hybrid Columnar Compression) removes the 255 columns limit</title>
		<link>http://www.pythian.com/news/15957/oracle-exadata-hcc-hybrid-columnar-compression-removes-the-255-columns-limit/</link>
		<comments>http://www.pythian.com/news/15957/oracle-exadata-hcc-hybrid-columnar-compression-removes-the-255-columns-limit/#comments</comments>
		<pubDate>Wed, 25 Aug 2010 22:00:49 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Exadata]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[exadata]]></category>
		<category><![CDATA[HCC]]></category>
		<category><![CDATA[hybrid columnar compression]]></category>
		<category><![CDATA[tables]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=15957</guid>
		<description><![CDATA[There is a little know fact that Oracle table compression doesn&#8217;t work with tables that have more than 255. It&#8217;s has been reported here and compression limitations in general here. As a follow up from my previous post on Exadata Design, where I question the use of dimensions for certain attributes in data warehouses, I [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/15957/oracle-exadata-hcc-hybrid-columnar-compression-removes-the-255-columns-limit/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Designing for Exadata: Maximizing Storage Indexes Use</title>
		<link>http://www.pythian.com/news/15531/designing-for-exadata-maximizing-storage-indexes-use/</link>
		<comments>http://www.pythian.com/news/15531/designing-for-exadata-maximizing-storage-indexes-use/#comments</comments>
		<pubDate>Fri, 13 Aug 2010 20:04:24 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Exadata]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[smart scan]]></category>
		<category><![CDATA[storage index]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=15531</guid>
		<description><![CDATA[Oracle Exadata V2 is a very well balanced database machine combined with smart and innovative software. One of these innovative features is the Storage Index (see also Marc&#8217;s post here) – a game changing feature in my opinion. What is the Storage Index? The Storage Index is more similar to partitions than to an index. [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/15531/designing-for-exadata-maximizing-storage-indexes-use/feed/</wfw:commentRss>
		<slash:comments>23</slash:comments>
		</item>
		<item>
		<title>Oracle&#8217;s OPT_ESTIMATE hint: Usage Guide</title>
		<link>http://www.pythian.com/news/13469/oracles-opt_estimate-hint-usage-guide/</link>
		<comments>http://www.pythian.com/news/13469/oracles-opt_estimate-hint-usage-guide/#comments</comments>
		<pubDate>Mon, 21 Jun 2010 19:49:29 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[hint]]></category>
		<category><![CDATA[performance]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=13469</guid>
		<description><![CDATA[It&#8217;s one of those hints that you&#8217;ve heard about many times, but all the information is scattered, and finding what you need is really hard. Many (including myself) have expressed the deepest desire to see it documented, but that never happened. I&#8217;ve just troubleshot a problem and used this hint a lot during my &#8220;what [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/13469/oracles-opt_estimate-hint-usage-guide/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>RAC+ASM 3 years in production. Stories to share (slides from RMOUG10)</title>
		<link>http://www.pythian.com/news/9055/oracle-rac-asm-3-years-in-production-stories-to-share-slides-from-rmoug10/</link>
		<comments>http://www.pythian.com/news/9055/oracle-rac-asm-3-years-in-production-stories-to-share-slides-from-rmoug10/#comments</comments>
		<pubDate>Tue, 02 Mar 2010 03:57:24 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Group Blog Posts]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Pythian Appearances]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[ASM]]></category>
		<category><![CDATA[RAC]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=9055</guid>
		<description><![CDATA[Here are the slides from my presentation at RMOUG 2010. I am not sure how much sense all this will make without my comments. We may do it in a webinar if there is sufficient interest. Regardless I will probably be doing it again at some point in the future. RAC+ASM: Stories to Share View [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/9055/oracle-rac-asm-3-years-in-production-stories-to-share-slides-from-rmoug10/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>Oracle Parallel Query Sorting and Index Creation Performance Problems</title>
		<link>http://www.pythian.com/news/5379/oracle-parallel-query-sorting-performance-problems/</link>
		<comments>http://www.pythian.com/news/5379/oracle-parallel-query-sorting-performance-problems/#comments</comments>
		<pubDate>Mon, 16 Nov 2009 19:34:10 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Technical Blog]]></category>
		<category><![CDATA[11.2]]></category>
		<category><![CDATA[order by]]></category>
		<category><![CDATA[PQ sort]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=5379</guid>
		<description><![CDATA[Ever wondered why recreating certain indexes takes forever, even when you do so in parallel? Ever wondered why certain PQ queries just don&#8217;t run that fast? Here&#8217;s a serious performance bug that&#8217;s been in Oracle for a while, and finally there are hints of it been fixed, but only partially. The bug happens when performing [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/5379/oracle-parallel-query-sorting-performance-problems/feed/</wfw:commentRss>
		<slash:comments>12</slash:comments>
		</item>
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		<title>Adding Columns with Default Values and Not Null in Oracle 11g</title>
		<link>http://www.pythian.com/news/1660/adding-columns-with-default-values-and-not-null-in-oracle-11g/</link>
		<comments>http://www.pythian.com/news/1660/adding-columns-with-default-values-and-not-null-in-oracle-11g/#comments</comments>
		<pubDate>Fri, 20 Mar 2009 20:09:44 +0000</pubDate>
		<dc:creator>Christo Kutrovsky</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[11g]]></category>
		<category><![CDATA[adding columns]]></category>
		<category><![CDATA[not null]]></category>

		<guid isPermaLink="false">http://www.pythian.com/news/?p=1660</guid>
		<description><![CDATA[Oracle 11g has a new performance enhancement when adding columns. In the pre-11g releases, adding a new not null column with a default value would have caused a massive update on the entire table, locking it for the operation and generating tons of undo and redo. I&#8217;ve seen this happening in production. Oracle 11g has [...]]]></description>
		<wfw:commentRss>http://www.pythian.com/news/1660/adding-columns-with-default-values-and-not-null-in-oracle-11g/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
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