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	<title>Application Performance, Scalability and Architecture – The dynaTrace Blog &#187; Database</title>
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		<title>Cassandra Write Performance &#8211; A quick look inside</title>
		<link>http://blog.dynatrace.com/2011/09/20/cassandra-write-performance-a-quick-look-inside/</link>
		<comments>http://blog.dynatrace.com/2011/09/20/cassandra-write-performance-a-quick-look-inside/#comments</comments>
		<pubDate>Tue, 20 Sep 2011 15:44:16 +0000</pubDate>
		<dc:creator>Michael Kopp</dc:creator>
				<category><![CDATA[Architecture and Performance]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[Virtualization/Cloud]]></category>
		<category><![CDATA[Cloud]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Garbage Collection]]></category>
		<category><![CDATA[nosql]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=4060</guid>
		<description><![CDATA[I was looking at Cassandra, one of the major NoSQL solutions, and I was immediately impressed with its write speed even on my notebook. But I also noticed that it was very volatile in its response time, so I took a deeper look at it. First Cassandra Write Test I did the first write tests [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2011/09/20/cassandra-write-performance-a-quick-look-inside/feed/</wfw:commentRss>
		<slash:comments>11</slash:comments>
		</item>
		<item>
		<title>Field Report &#8211; Application Performance Management in WebSphere Environments</title>
		<link>http://blog.dynatrace.com/2011/05/10/field-report-application-performance-management-in-websphere-environments/</link>
		<comments>http://blog.dynatrace.com/2011/05/10/field-report-application-performance-management-in-websphere-environments/#comments</comments>
		<pubDate>Tue, 10 May 2011 06:43:40 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[Architecture and Performance]]></category>
		<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[BestPractice]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[devops]]></category>
		<category><![CDATA[Memory]]></category>
		<category><![CDATA[Monitoring]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[Production]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=3590</guid>
		<description><![CDATA[Just in time for the upcoming Webinar with The BonTon Stores, were we talk about the challenges in operating complex WebSphere environments, we had another set of prospects running their applications on WebSphere. Francis Cordon, a colleague of mine, shares some of the screenshots resulting from these engagements. In this blog I want to highlight [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2011/05/10/field-report-application-performance-management-in-websphere-environments/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>How Database Queries Slow Down Confluence User Search</title>
		<link>http://blog.dynatrace.com/2011/01/17/how-database-queries-slow-down-confluence-user-search/</link>
		<comments>http://blog.dynatrace.com/2011/01/17/how-database-queries-slow-down-confluence-user-search/#comments</comments>
		<pubDate>Mon, 17 Jan 2011 08:05:04 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[Architecture and Performance]]></category>
		<category><![CDATA[From the lab]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[O/R Mapper]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[web]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=2778</guid>
		<description><![CDATA[We are using Confluence for both our internal Wiki as well as for our external Community Portal. I just came across a very nasty performance bug in the version we are running on our external system. We run 3.2 and the User Search Feature keeps me waiting several minutes each time I search for users. [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2011/01/17/how-database-queries-slow-down-confluence-user-search/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Week 38 &#8211; Transactions in a JPA World</title>
		<link>http://blog.dynatrace.com/2010/09/14/week-38-transactions-in-a-jpa-world/</link>
		<comments>http://blog.dynatrace.com/2010/09/14/week-38-transactions-in-a-jpa-world/#comments</comments>
		<pubDate>Tue, 14 Sep 2010 01:17:08 +0000</pubDate>
		<dc:creator>Alois Reitbauer</dc:creator>
				<category><![CDATA[Architecture and Performance]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Hibernate]]></category>
		<category><![CDATA[JPA]]></category>
		<category><![CDATA[Performance Almanac]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=2517</guid>
		<description><![CDATA[The use of transactions is a cornerstone when building database applications. However in our daily work, we often do not really care much about them. In many cases they are handled implicitly for us by the (J EE) container or application framework – such as Spring &#8211; we are using. We rely on these frameworks [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2010/09/14/week-38-transactions-in-a-jpa-world/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>Top 3 Performance Problems in Custom Microsoft CRM Applications</title>
		<link>http://blog.dynatrace.com/2010/09/02/top-3-performance-problems-in-custom-microsoft-crm-applications/</link>
		<comments>http://blog.dynatrace.com/2010/09/02/top-3-performance-problems-in-custom-microsoft-crm-applications/#comments</comments>
		<pubDate>Thu, 02 Sep 2010 16:00:12 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[.NET]]></category>
		<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Frameworks]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=2474</guid>
		<description><![CDATA[After spending a lot of time focusing on Client-Side Web 2.0 Performance Problems it is time to focus on specific Server-Side Performance Problems. Last week I worked with a client that runs a custom application on Microsoft CRM 4.0 and experienced performance problems in their test environment. Individual web requests to query or update data [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2010/09/02/top-3-performance-problems-in-custom-microsoft-crm-applications/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>How to Monitor Oracle Database Performance</title>
		<link>http://blog.dynatrace.com/2010/07/19/how-to-monitor-oracle-database-performance/</link>
		<comments>http://blog.dynatrace.com/2010/07/19/how-to-monitor-oracle-database-performance/#comments</comments>
		<pubDate>Mon, 19 Jul 2010 13:38:35 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Monitoring]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=2358</guid>
		<description><![CDATA[An Oracle database provides several v$ views to query information about the database instance, including statistical information that can be used for monitoring and problem analysis purposes. Rene Nyffenegger wrote a nice Summary on Oracle&#8217;s v$ views that gives an overview of all available views. The following illustration shows a dashboard with key metrics that [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2010/07/19/how-to-monitor-oracle-database-performance/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Top .NET Performance Problems and how to avoid them</title>
		<link>http://blog.dynatrace.com/2009/11/24/top-net-performance-problems-and-how-to-avoid-them/</link>
		<comments>http://blog.dynatrace.com/2009/11/24/top-net-performance-problems-and-how-to-avoid-them/#comments</comments>
		<pubDate>Tue, 24 Nov 2009 12:23:49 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[.NET]]></category>
		<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Frameworks]]></category>
		<category><![CDATA[SharePoint]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1209</guid>
		<description><![CDATA[Every time I work with one of our .NET customers to help them with managing their application performance I come across the same problems as seen with other clients before: lots of ADO.NET queries, many hidden exceptions in core or 3rd party .NET libraries, slow 3rd party components, inefficient custom code, &#8230; Too often we [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2009/11/24/top-net-performance-problems-and-how-to-avoid-them/feed/</wfw:commentRss>
		<slash:comments>11</slash:comments>
		</item>
		<item>
		<title>JPA Under The Hood &#8211; Understanding the Dynamics of Your JPA Framework</title>
		<link>http://blog.dynatrace.com/2009/11/12/w-jax-jpa-under-the-hood/</link>
		<comments>http://blog.dynatrace.com/2009/11/12/w-jax-jpa-under-the-hood/#comments</comments>
		<pubDate>Thu, 12 Nov 2009 10:45:23 +0000</pubDate>
		<dc:creator>Alois Reitbauer</dc:creator>
				<category><![CDATA[Architecture and Performance]]></category>
		<category><![CDATA[Java]]></category>
		<category><![CDATA[Public Events]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Frameworks]]></category>
		<category><![CDATA[Hibernate]]></category>
		<category><![CDATA[O/R Mapper]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1120</guid>
		<description><![CDATA[I recently gave a talks on the behaviour of different JPA frameworks at W-JAX(Germany) and TheServerSide Java Symposium (Prague). As some people have asked me, I am publishing the samples as well. I would also give away the eclipse project, however with all the third party libraries I am sure I will end up not [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2009/11/12/w-jax-jpa-under-the-hood/feed/</wfw:commentRss>
		<slash:comments>15</slash:comments>
		</item>
		<item>
		<title>Video on Common Performance Antipatterns online</title>
		<link>http://blog.dynatrace.com/2009/10/16/video-on-common-performance-antipatterns-online/</link>
		<comments>http://blog.dynatrace.com/2009/10/16/video-on-common-performance-antipatterns-online/#comments</comments>
		<pubDate>Fri, 16 Oct 2009 07:32:33 +0000</pubDate>
		<dc:creator>Alois Reitbauer</dc:creator>
				<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[Public Events]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Hibernate]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[Testing]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1019</guid>
		<description><![CDATA[Last year at devoxx I gave a talk on common pitfalls in performance management. Parleys has now put the talk online. A couple of people have been asking to get slides. Now you can even get the voice and the slides. In this presentation I give an overview of typical performance antipatterns. I discuss conceptual, [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2009/10/16/video-on-common-performance-antipatterns-online/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Linq2Sql: Prevent performance issues when operating on multiple rows with Stored Procedures</title>
		<link>http://blog.dynatrace.com/2009/04/30/linq2sql-prevent-performance-issues-when-operating-on-multiple-rows-with-stored-procedures/</link>
		<comments>http://blog.dynatrace.com/2009/04/30/linq2sql-prevent-performance-issues-when-operating-on-multiple-rows-with-stored-procedures/#comments</comments>
		<pubDate>Thu, 30 Apr 2009 14:31:59 +0000</pubDate>
		<dc:creator>Andreas Grabner</dc:creator>
				<category><![CDATA[.NET]]></category>
		<category><![CDATA[Patterns and Practices]]></category>
		<category><![CDATA[Database]]></category>
		<category><![CDATA[Performance]]></category>

		<guid isPermaLink="false">http://blog.dynatrace.com/?p=472</guid>
		<description><![CDATA[Many of you bloggers out there have already covered the fact that Stored Procedures should be used for INSERTS, UPDATES and DELETES or in general when modifying multiple rows in a batch like statement. I also came across other blogs that discussed deleting or updated multiple entities with the standard interfaces of Linq2Sql &#8211; not [...]]]></description>
		<wfw:commentRss>http://blog.dynatrace.com/2009/04/30/linq2sql-prevent-performance-issues-when-operating-on-multiple-rows-with-stored-procedures/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
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