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    <title>Slideshows by User: markwkm</title>
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    <pubDate>Sun, 18 Oct 2009 06:01:00 GMT</pubDate>
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      <title>pg_proctab: Accessing System Stats in PostgreSQL</title>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/lfnw2009-pg-091018010107-phpapp02-thumbnail-2?1255845716" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> pg_proctab is a collection of PostgreSQL stored functions that provide access to the operating system process table using SQL. We&rsquo;ll show you which functions are available and where they collect the data, and give examples of their use to collect processor and I/O statistics on SQL queries. These stored functions currently only work on Linux-based systems.]]>
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      <pubDate>Sun, 18 Oct 2009 06:01:00 GMT</pubDate>
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        <media:title>pg_proctab: Accessing System Stats in PostgreSQL</media:title>
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        <media:description type="plain">pg_proctab is a collection of PostgreSQL stored functions that provide access to the operating system process table using SQL. We&amp;rsquo;ll show you which functions are available and where they collect the data, and give examples of their use to collect processor and I/O statistics on SQL queries. These stored functions currently only work on Linux-based systems.</media:description>
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      <title>PostgreSQL Portland Performance Practice Project - Database Test 2 Tuning</title>
      <link>http://www.slideshare.net/markwkm/postgresql-portland-performance-practice-project-database-test-2-tuning</link>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/05-dbt2-tuning-090516225524-phpapp01-thumbnail-2?1242605536" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> Sixth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through some experimentation of setting different PostgreSQL global user configuration (GUC) parameters.]]>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/05-dbt2-tuning-090516225524-phpapp01-thumbnail-2?1242605536" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> Sixth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through some experimentation of setting different PostgreSQL global user configuration (GUC) parameters.]]>
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      <pubDate>Sun, 17 May 2009 03:55:18 GMT</pubDate>
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        <media:description type="plain">Sixth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through some experimentation of setting different PostgreSQL global user configuration (GUC) parameters.</media:description>
        <media:text type="html">&lt;img src=&quot;http://cdn.slidesharecdn.com/05-dbt2-tuning-090516225524-phpapp01-thumbnail-2?1242605536&quot; alt =&quot;&quot; style=&quot;border:1px solid #C3E6D8;float:right;&quot; /&gt;&lt;br&gt; Sixth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through some experimentation of setting different PostgreSQL global user configuration (GUC) parameters.</media:text>
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      <title>pg_proctab: Accessing System Stats in PostgreSQL</title>
      <link>http://www.slideshare.net/markwkm/pgproctab-accessing-system-stats-in-postgresql</link>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/lfnw2009-pg-090425210327-phpapp01-thumbnail-2?1240711415" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> pc_proctab is a collection of PostgreSQL stored functions that allow you to access the operating system process table using SQL.   See examples on how to use these stored functions to collect processor and I/O statistics on SQL statements run against the database.]]>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/lfnw2009-pg-090425210327-phpapp01-thumbnail-2?1240711415" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> pc_proctab is a collection of PostgreSQL stored functions that allow you to access the operating system process table using SQL.   See examples on how to use these stored functions to collect processor and I/O statistics on SQL statements run against the database.]]>
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      <pubDate>Sun, 26 Apr 2009 02:03:21 GMT</pubDate>
      <guid>http://www.slideshare.net/markwkm/pgproctab-accessing-system-stats-in-postgresql</guid>
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        <media:title>pg_proctab: Accessing System Stats in PostgreSQL</media:title>
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        <media:description type="plain">pc_proctab is a collection of PostgreSQL stored functions that allow you to access the operating system process table using SQL.   See examples on how to use these stored functions to collect processor and I/O statistics on SQL statements run against the database.</media:description>
        <media:text type="html">&lt;img src=&quot;http://cdn.slidesharecdn.com/lfnw2009-pg-090425210327-phpapp01-thumbnail-2?1240711415&quot; alt =&quot;&quot; style=&quot;border:1px solid #C3E6D8;float:right;&quot; /&gt;&lt;br&gt; pc_proctab is a collection of PostgreSQL stored functions that allow you to access the operating system process table using SQL.   See examples on how to use these stored functions to collect processor and I/O statistics on SQL statements run against the database.</media:text>
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      <title>Filesystem Performance from a Database Perspective</title>
      <link>http://www.slideshare.net/markwkm/filesystem-performance-from-a-database-perspective</link>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/lfnw2009-fs-090425125600-phpapp01-thumbnail-2?1240682261" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> How do you choose the right filesystem for your database management system? 

Administrators have a variety of filesystems to choose from, as well as volume management and hardware or software RAID. This talk will examine how different the performance of filesystems really are, and how do you go about   systematically determining which configuration will be the best for your application and hardware. 

This talk will present data generated by a group of volunteers running performance tests for database tuning. We were curious if the file systems would really behave like we expected them to, especially when used in conjunction with RAID or volume management. 

There is also more to file systems than how fast we can read to or write to them. Reliability is critical for production environments, and proving that is a key part of evaluating performance. 

The talk will review and confirm or deny assumptions that many system administrators and developers make about filesystems and databases. 

Data shared will include baseline throughput determined with exhaustive fio tests.]]>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/lfnw2009-fs-090425125600-phpapp01-thumbnail-2?1240682261" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> How do you choose the right filesystem for your database management system? 

Administrators have a variety of filesystems to choose from, as well as volume management and hardware or software RAID. This talk will examine how different the performance of filesystems really are, and how do you go about   systematically determining which configuration will be the best for your application and hardware. 

This talk will present data generated by a group of volunteers running performance tests for database tuning. We were curious if the file systems would really behave like we expected them to, especially when used in conjunction with RAID or volume management. 

There is also more to file systems than how fast we can read to or write to them. Reliability is critical for production environments, and proving that is a key part of evaluating performance. 

The talk will review and confirm or deny assumptions that many system administrators and developers make about filesystems and databases. 

Data shared will include baseline throughput determined with exhaustive fio tests.]]>
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      <pubDate>Sat, 25 Apr 2009 17:55:56 GMT</pubDate>
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        <media:description type="plain">How do you choose the right filesystem for your database management system? 

Administrators have a variety of filesystems to choose from, as well as volume management and hardware or software RAID. This talk will examine how different the performance of filesystems really are, and how do you go about   systematically determining which configuration will be the best for your application and hardware. 

This talk will present data generated by a group of volunteers running performance tests for database tuning. We were curious if the file systems would really behave like we expected them to, especially when used in conjunction with RAID or volume management. 

There is also more to file systems than how fast we can read to or write to them. Reliability is critical for production environments, and proving that is a key part of evaluating performance. 

The talk will review and confirm or deny assumptions that many system administrators and developers make about filesystems and databases. 

Data shared will include baseline throughput determined with exhaustive fio tests.</media:description>
        <media:text type="html">&lt;img src=&quot;http://cdn.slidesharecdn.com/lfnw2009-fs-090425125600-phpapp01-thumbnail-2?1240682261&quot; alt =&quot;&quot; style=&quot;border:1px solid #C3E6D8;float:right;&quot; /&gt;&lt;br&gt; How do you choose the right filesystem for your database management system? 

Administrators have a variety of filesystems to choose from, as well as volume management and hardware or software RAID. This talk will examine how different the performance of filesystems really are, and how do you go about   systematically determining which configuration will be the best for your application and hardware. 

This talk will present data generated by a group of volunteers running performance tests for database tuning. We were curious if the file systems would really behave like we expected them to, especially when used in conjunction with RAID or volume management. 

There is also more to file systems than how fast we can read to or write to them. Reliability is critical for production environments, and proving that is a key part of evaluating performance. 

The talk will review and confirm or deny assumptions that many system administrators and developers make about filesystems and databases. 

Data shared will include baseline throughput determined with exhaustive fio tests.</media:text>
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        <![CDATA[<div style="width:425px;text-align:left" id="__ss_1341548"><a style="font:14px Helvetica,Arial,Sans-serif;display:block;margin:12px 0 3px 0;text-decoration:underline;" href="http://www.slideshare.net/markwkm/filesystem-performance-from-a-database-perspective" title="Filesystem Performance from a Database Perspective">Filesystem Performance from a Database Perspective</a><object style="margin:0px" width="425" height="355"><param name="movie" value="http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=lfnw2009-fs-090425125600-phpapp01&stripped_title=filesystem-performance-from-a-database-perspective" /><param name="allowFullScreen" value="true"/><param name="allowScriptAccess" value="always"/><embed src="http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=lfnw2009-fs-090425125600-phpapp01&stripped_title=filesystem-performance-from-a-database-perspective" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="355"></embed></object><div style="font-size:11px;font-family:tahoma,arial;height:26px;padding-top:2px;">View more <a style="text-decoration:underline;" href="http://www.slideshare.net/">documents</a> from <a style="text-decoration:underline;" href="http://www.slideshare.net/markwkm">Mark Wong</a>.</div></div>]]>
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      <title>PostgreSQL Portland Performance Practice Project - Database Test 2 Filesystem Characterization</title>
      <link>http://www.slideshare.net/markwkm/postgresql-portland-performance-practice-project-database-test-2-filesystem-characterization</link>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/04-dbt2-linux-filesystems-090410203844-phpapp02-thumbnail-2?1239558229" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> Fifth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through results of different hardware RAID configurations to show why it is important to test your own hardware: it might be performing in way you don&rsquo;t expect.]]>
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        <![CDATA[<img src="http://cdn.slidesharecdn.com/04-dbt2-linux-filesystems-090410203844-phpapp02-thumbnail-2?1239558229" alt ="" style="border:1px solid #C3E6D8;float:right;" /><br> Fifth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation goes through results of different hardware RAID configurations to show why it is important to test your own hardware: it might be performing in way you don&rsquo;t expect.]]>
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      <pubDate>Sat, 11 Apr 2009 01:38:43 GMT</pubDate>
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