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	<description>Karthick P.K on SQL Server</description>
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		<title>False warning &#8220;A significant part of sql server process memory has been paged out&#8221;</title>
		<link>http://mssqlwiki.com/2013/06/13/false-warning-a-significant-part-of-sql-server-process-memory-has-been-paged-out/</link>
		<comments>http://mssqlwiki.com/2013/06/13/false-warning-a-significant-part-of-sql-server-process-memory-has-been-paged-out/#comments</comments>
		<pubDate>Thu, 13 Jun 2013 06:10:48 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[A significant part of sql server process memory has been paged out. This may result in a performance degradation]]></category>
		<category><![CDATA[False working set trim warning]]></category>
		<category><![CDATA[significant part of sql server process memory has been paged]]></category>
		<category><![CDATA[SQL Server is paged]]></category>
		<category><![CDATA[SQLserver working set]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1360</guid>
		<description><![CDATA[In A significant part of SQL Server process memory has been paged out we discussed about SQL Server working set trim warning, when they can occur and how to troubleshoot them. I the same blog I mentioned SQL Server will log “A significant part of sql server process memory has been paged out” warning when [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1360&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<title>What does MemoryUtilization in sys.dm_os_ring_buffers and Memory_utilization_percentage in sys.dm_os_process_memory represents?</title>
		<link>http://mssqlwiki.com/2013/06/02/what-does-memoryutilization-in-sys-dm_os_ring_buffers-and-memory_utilization_percentage-in-sys-dm_os_process_memory-represents/</link>
		<comments>http://mssqlwiki.com/2013/06/02/what-does-memoryutilization-in-sys-dm_os_ring_buffers-and-memory_utilization_percentage-in-sys-dm_os_process_memory-represents/#comments</comments>
		<pubDate>Sun, 02 Jun 2013 07:30:20 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[dm_os_process_memory]]></category>
		<category><![CDATA[Memory utilization percentage]]></category>
		<category><![CDATA[MemoryUtilization SQLServer]]></category>
		<category><![CDATA[SQL Server working set percentage]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1346</guid>
		<description><![CDATA[Few days back someone asked me an interesting question.&#160; Why memory_utilization_percentage (working set ) is 100 % when Virtual_address_space_committed_Kb ( committed ) is around 10 GB and Physical_memory_in_use_kb is just 1.7 GB (refer below image)? Physical_memory_in_use_kb is Memory allocated by the SQL Server process which is currently in RAM. (This includes AWE and Large pages [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1346&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>3</slash:comments>
	
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		<title>SQL Server monitor</title>
		<link>http://mssqlwiki.com/2013/05/11/sql-server-monitor/</link>
		<comments>http://mssqlwiki.com/2013/05/11/sql-server-monitor/#comments</comments>
		<pubDate>Sat, 11 May 2013 05:42:03 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Connectivity]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server Tools]]></category>
		<category><![CDATA[Monitoring SQL Server]]></category>
		<category><![CDATA[sql server monitoring]]></category>
		<category><![CDATA[SQLServer connectivity failure]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1322</guid>
		<description><![CDATA[Every SQL Server DBA would have faced situations similar to SQL Server not accepting connections for few minutes, SQL Server not responding for few minute or Applications not able to connect with SQL Server for few minutes. Before DBA’s gets alerted about the situation and starts troubleshooting the issue everything becomes normal. Challenge in this [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1322&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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		<title>Max server memory &#8211; Do I need to configure?</title>
		<link>http://mssqlwiki.com/2013/04/22/max-server-memory-do-i-need-to-configure/</link>
		<comments>http://mssqlwiki.com/2013/04/22/max-server-memory-do-i-need-to-configure/#comments</comments>
		<pubDate>Mon, 22 Apr 2013 08:29:45 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[how to set max server memory]]></category>
		<category><![CDATA[How to set min server memory]]></category>
		<category><![CDATA[max server memory]]></category>
		<category><![CDATA[Minimum server memory]]></category>
		<category><![CDATA[sql server maximum server memory]]></category>
		<category><![CDATA[sql server memory configuration]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1308</guid>
		<description><![CDATA[Do I need to configure Max server memory and min server memory?&#160; What is the right value for&#160; this configuration and how to determine it? There are many debates around this and above questions are raised by many SQL Server DBA’s frequently in many forums. If you ask me , “It depends” on various factors. [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1308&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>12</slash:comments>
	
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		<title>SQL Server and VMware ballooning</title>
		<link>http://mssqlwiki.com/2013/03/31/sql-server-and-vmware-ballooning/</link>
		<comments>http://mssqlwiki.com/2013/03/31/sql-server-and-vmware-ballooning/#comments</comments>
		<pubDate>Sun, 31 Mar 2013 12:58:55 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[Driver locked is high]]></category>
		<category><![CDATA[SQLServer and VMware ballooning]]></category>
		<category><![CDATA[SQLServer on VMware]]></category>
		<category><![CDATA[SQLServer slow in VMware]]></category>
		<category><![CDATA[VMware driver locked]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1296</guid>
		<description><![CDATA[VMware and SQL Server performance If you are running production SQL Server on VM-Ware double check if you have configured/disabled ballooning for the virtual machine in which SQL Server is running. What is ballooning?&#160; Method by which VMware host can&#160; reclaim memory from the Virtual machines. Is it really bad to give memory from Guest [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1296&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Smile</media:title>
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		<title>Inside sys.dm_os_ring_buffers</title>
		<link>http://mssqlwiki.com/2013/03/29/inside-sys-dm_os_ring_buffers/</link>
		<comments>http://mssqlwiki.com/2013/03/29/inside-sys-dm_os_ring_buffers/#comments</comments>
		<pubDate>Fri, 29 Mar 2013 05:44:20 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[SQL Server Tools]]></category>
		<category><![CDATA[dm_os_ring_buffers]]></category>
		<category><![CDATA[RING_BUFFER_CONNECTIVITY]]></category>
		<category><![CDATA[RING_BUFFER_EXCEPTION]]></category>
		<category><![CDATA[RING_BUFFER_RESOURCE_MONITOR]]></category>
		<category><![CDATA[RING_BUFFER_SCHEDULER_MONITOR]]></category>
		<category><![CDATA[RING_BUFFER_SECURITY_ERROR]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1281</guid>
		<description><![CDATA[Sys.dm_os_ring_buffers DMV can be used to troubleshoot connectivity errors, track exceptions, monitor system health, memory pressure, Non-yielding/Deadlocked schedulers and a lot more. You can use below scripts to query the data from sys.dm_os_ring_buffers during troubleshooting. &#160; &#160; &#160; If you liked this post, do like us on Facebook at https://www.facebook.com/mssqlwiki and join our Facebook group [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1281&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>SQL Server lock pages in memory</title>
		<link>http://mssqlwiki.com/2013/03/26/sql-server-lock-pages-in-memory/</link>
		<comments>http://mssqlwiki.com/2013/03/26/sql-server-lock-pages-in-memory/#comments</comments>
		<pubDate>Tue, 26 Mar 2013 08:43:20 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[Large pages SQLServer]]></category>
		<category><![CDATA[lock pages in memory]]></category>
		<category><![CDATA[SQLServer LPIM]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1276</guid>
		<description><![CDATA[Lock pages in memory is again a black box for many SQL Server DBA’s. Configuration choice to enable lock pages in memory depends on various aspects. Before we get in to internals we will recollect some of the basics of SQL Server lock pages in memory in 64-Bit SQL Servers. What is Locked pages in [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1276&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>3</slash:comments>
	
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		<title>SQL Server -g</title>
		<link>http://mssqlwiki.com/2013/03/05/sql-server-g/</link>
		<comments>http://mssqlwiki.com/2013/03/05/sql-server-g/#comments</comments>
		<pubDate>Tue, 05 Mar 2013 07:06:30 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[Memtoleave calculation]]></category>
		<category><![CDATA[sqlserver -g]]></category>
		<category><![CDATA[sqlserver -g switch]]></category>
		<category><![CDATA[sqlserver memory]]></category>
		<category><![CDATA[what is sql server -g]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1266</guid>
		<description><![CDATA[I decide to write this quick blog after seeing a lot of confusion around sqlserver -g switch.&#160; sql server -g switch is nop in 64-Bit sqlserver and it is used in 32-bit sqlserver to increase the size of MTL(AKA MemToLeave). The default value of -g switch is 256 MB. I.e. if you do not specify [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1266&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>6</slash:comments>
	
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		<title>SQL Server Operating system (SOS) &#8211; Series 3</title>
		<link>http://mssqlwiki.com/2013/02/11/sql-server-operating-system-sos-series-3/</link>
		<comments>http://mssqlwiki.com/2013/02/11/sql-server-operating-system-sos-series-3/#comments</comments>
		<pubDate>Mon, 11 Feb 2013 07:43:16 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQLServer SOS]]></category>
		<category><![CDATA[Inside SQLserver OS]]></category>
		<category><![CDATA[SOS scheduler]]></category>
		<category><![CDATA[SQLOS]]></category>
		<category><![CDATA[SQLServer operating system]]></category>
		<category><![CDATA[SQLServer scheduler]]></category>
		<category><![CDATA[UMS]]></category>
		<category><![CDATA[User mode sceduler]]></category>
		<category><![CDATA[What is SQLSOS?]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1253</guid>
		<description><![CDATA[Thread synchronization When we discussed about thread I mentioned In multi-threaded applications each thread has to synchronize their activities among other threads. Sometimes a thread has to wait for other thread to complete before it can execute (Ex: SQL Server blocking)   sometimes a thread has to synchronize with other thread and continue execution (Ex: CX [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1253&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>SQL Server Operating system (SOS) &#8211; Series 2</title>
		<link>http://mssqlwiki.com/2013/01/13/sql-server-operating-system-sos-series-2/</link>
		<comments>http://mssqlwiki.com/2013/01/13/sql-server-operating-system-sos-series-2/#comments</comments>
		<pubDate>Sun, 13 Jan 2013 14:09:38 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQLServer SOS]]></category>
		<category><![CDATA[Inside SQLOS]]></category>
		<category><![CDATA[SOS]]></category>
		<category><![CDATA[SQL Server operating system]]></category>
		<category><![CDATA[SQL Server SOS]]></category>
		<category><![CDATA[SQLOS]]></category>
		<category><![CDATA[SQLServer scheduler]]></category>
		<category><![CDATA[UMS]]></category>
		<category><![CDATA[User mode sceduler]]></category>
		<category><![CDATA[What is SQLSOS?]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1229</guid>
		<description><![CDATA[Context Switching: When a thread is yielded from CPU windows stores the CONTEXT (current state such as CPU registers, program counters Etc) information of the current thread and loads the CONTEXT of the new thread which will run in the CPU.&#160;&#160; Why? A thread is yielded when executing an instruction, How the thread will resume [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1229&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<title>SQL Server Operating system (SOS) &#8211; Series 1</title>
		<link>http://mssqlwiki.com/2013/01/10/sql-server-operating-system-sos-series-1/</link>
		<comments>http://mssqlwiki.com/2013/01/10/sql-server-operating-system-sos-series-1/#comments</comments>
		<pubDate>Thu, 10 Jan 2013 11:04:35 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQLServer SOS]]></category>
		<category><![CDATA[Inside SQLOS]]></category>
		<category><![CDATA[SOS]]></category>
		<category><![CDATA[SQLOS]]></category>
		<category><![CDATA[SQLServer operating system]]></category>
		<category><![CDATA[UMS]]></category>
		<category><![CDATA[What is SOS]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1209</guid>
		<description><![CDATA[Before we start studying SQLOS we will recollect some of the basic OS concepts.&#160; What is process? Process is instance of service or application which is running. Each process will have address space that contains all the Executable, Dlls, data, thread stacks etc.&#160; Operating system maintains a kernel objects for each process to manage the [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1209&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2013/01/10/sql-server-operating-system-sos-series-1/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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		<title>SQL Server fails to start with error &quot;Failed allocate pages: FAIL_PAGE_ALLOCATION 1&quot; During startup</title>
		<link>http://mssqlwiki.com/2013/01/06/sql-server-fails-to-start-with-error-failed-allocate-pages-fail_page_allocation-1-during-startup/</link>
		<comments>http://mssqlwiki.com/2013/01/06/sql-server-fails-to-start-with-error-failed-allocate-pages-fail_page_allocation-1-during-startup/#comments</comments>
		<pubDate>Sun, 06 Jan 2013 03:24:32 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Configuration]]></category>
		<category><![CDATA[Memory]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[Startup failures]]></category>
		<category><![CDATA[17311]]></category>
		<category><![CDATA[Event ID: 2019]]></category>
		<category><![CDATA[Failed allocate pages: FAIL_PAGE_ALLOCATION 1]]></category>
		<category><![CDATA[Severity: 16 State: 1. (Params:).]]></category>
		<category><![CDATA[The server was unable to allocate from the system nonpaged pool because the pool was empty]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1200</guid>
		<description><![CDATA[SQL Server fails to start and If you look at the SQL Server Error log you will find &#34;Failed allocate pages: FAIL_PAGE_ALLOCATION&#34; and SQL Server generating exception dump. Similar to the SQL Server error log below. &#160; Note: This blog is applicable when you out get of memory error during startup (or) with event ID: [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1200&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2013/01/06/sql-server-fails-to-start-with-error-failed-allocate-pages-fail_page_allocation-1-during-startup/feed/</wfw:commentRss>
		<slash:comments>14</slash:comments>
	
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		<title>Debugging memory Leaks using Debug diagnostic tool.</title>
		<link>http://mssqlwiki.com/2012/12/06/debugging-memory-leaks-using-debug-diagnostic-tool/</link>
		<comments>http://mssqlwiki.com/2012/12/06/debugging-memory-leaks-using-debug-diagnostic-tool/#comments</comments>
		<pubDate>Thu, 06 Dec 2012 09:22:25 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Debugging]]></category>
		<category><![CDATA[Memory]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[debug diagnostics tool memory leak]]></category>
		<category><![CDATA[how to find a leak]]></category>
		<category><![CDATA[memory leak]]></category>
		<category><![CDATA[memory leak in]]></category>
		<category><![CDATA[SQLServer memory leaks]]></category>
		<category><![CDATA[what are memory leaks]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1182</guid>
		<description><![CDATA[In my previous post (SQL Server memory leak ) I explained how to identify the modules&#160; which are leaking the memory using ‘!heap’ commands.&#160; Sometimes we may not be able to find the cause by displaying the memory using ‘!d’ commands to find the patterns or using search memory commands (s). In such scenarios&#160; we [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1182&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/12/06/debugging-memory-leaks-using-debug-diagnostic-tool/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
	
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		<title>SQL Server memory leak</title>
		<link>http://mssqlwiki.com/2012/12/04/sql-server-memory-leak/</link>
		<comments>http://mssqlwiki.com/2012/12/04/sql-server-memory-leak/#comments</comments>
		<pubDate>Tue, 04 Dec 2012 14:02:41 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Debugging]]></category>
		<category><![CDATA[Memory]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[memory leak]]></category>
		<category><![CDATA[Memory leaks in SQL Server]]></category>
		<category><![CDATA[MTL erros in SQL Server]]></category>
		<category><![CDATA[sqlserver memory]]></category>
		<category><![CDATA[tracking memory leaks in SQL Server]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1156</guid>
		<description><![CDATA[What is memory leak? When a process allocates memory it is supposed to de-allocate it and release it back to OS. If it misses to de-allocate the memory due to flaw in code it is called as leak and It can cause memory pressure both to the operating system and application.   Myth about SQL [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1156&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>21</slash:comments>
	
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		<title>SQL Server NUMA load distribution</title>
		<link>http://mssqlwiki.com/2012/11/22/sql-server-numa-load-distribution/</link>
		<comments>http://mssqlwiki.com/2012/11/22/sql-server-numa-load-distribution/#comments</comments>
		<pubDate>Thu, 22 Nov 2012 12:59:54 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Debugging]]></category>
		<category><![CDATA[Memory]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[configuring NUMA nodes in sqlserver]]></category>
		<category><![CDATA[CPU Affinity]]></category>
		<category><![CDATA[SQLSERVER NUMA]]></category>
		<category><![CDATA[Work load distribution in NUMA]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1144</guid>
		<description><![CDATA[When port affinity is not configured all the connection to SQL Server enters through single port and connections are tied to nodes in round robin basis. &#160; We might end with Imbalance of Workload in NUMA systems under below conditions. &#160; 1. When a connection is tied (or) affinitized to a node, all the work [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1144&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/11/22/sql-server-numa-load-distribution/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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		<item>
		<title>Query optimization</title>
		<link>http://mssqlwiki.com/2012/11/06/tuning-sql-server-query/</link>
		<comments>http://mssqlwiki.com/2012/11/06/tuning-sql-server-query/#comments</comments>
		<pubDate>Tue, 06 Nov 2012 10:37:59 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Query]]></category>
		<category><![CDATA[query optimization]]></category>
		<category><![CDATA[query performance tuning]]></category>
		<category><![CDATA[Query tuning]]></category>
		<category><![CDATA[query tuning in sql server]]></category>
		<category><![CDATA[sql performance]]></category>
		<category><![CDATA[sql query optimizer]]></category>
		<category><![CDATA[sql query tuning]]></category>
		<category><![CDATA[sql server -2147217871]]></category>
		<category><![CDATA[sql server query tuning]]></category>
		<category><![CDATA[Tuning sql server query]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1067</guid>
		<description><![CDATA[Tuning slow queries in SQL Server. How to troubleshoot slow queries in SQL, resolve error sql server -2147217871 Query timeout expired &#160;and make them run faster? A query in considered to be slow when it is executing for longer duration than expected. Total duration of the query can be broken in to compile time, CPU [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1067&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>4</slash:comments>
	
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		<title>SQL Server 2012 Memory</title>
		<link>http://mssqlwiki.com/2012/10/21/sql-server-2012-memory-2/</link>
		<comments>http://mssqlwiki.com/2012/10/21/sql-server-2012-memory-2/#comments</comments>
		<pubDate>Sun, 21 Oct 2012 10:51:00 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA[Changes in SQL server memory]]></category>
		<category><![CDATA[denali memory model]]></category>
		<category><![CDATA[mssqlwiki.com]]></category>
		<category><![CDATA[sql server 2012 changes in memory]]></category>
		<category><![CDATA[sql server 2012 memory architecture]]></category>
		<category><![CDATA[sql server 2012 memory management]]></category>
		<category><![CDATA[SQL Server 2102 memory changes]]></category>
		<category><![CDATA[sql server maximum server memory]]></category>
		<category><![CDATA[SQLServer memory architecture changes]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=1008</guid>
		<description><![CDATA[SQL Server 2012 has made many changes to the memory manager to govern the SQL Server memory consumption in efficient way compared with earlier versions. Important changes to SQL Server 2012 memory which every DBA should be aware of is documented in this blog. If you are not familiar with the SQL Server memory architecture [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=1008&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>14</slash:comments>
	
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		<title>SQL Server Exception , EXCEPTION_ACCESS_VIOLATION and SQL Server Assertion</title>
		<link>http://mssqlwiki.com/2012/10/16/sql-server-exception_access_violation-and-sql-server-assertion/</link>
		<comments>http://mssqlwiki.com/2012/10/16/sql-server-exception_access_violation-and-sql-server-assertion/#comments</comments>
		<pubDate>Tue, 16 Oct 2012 08:37:58 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Debugging]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[Startup failures]]></category>
		<category><![CDATA[access of violation at address]]></category>
		<category><![CDATA[Access Violation occurred reading address]]></category>
		<category><![CDATA[Access Violation occurred writing address]]></category>
		<category><![CDATA[BEGIN STACK DUMP:]]></category>
		<category><![CDATA[exception access violation c0000005]]></category>
		<category><![CDATA[Exception Code = c0000005 EXCEPTION_ACCESS_VIOLATION]]></category>
		<category><![CDATA[ex_terminator - Last chance exception handling]]></category>
		<category><![CDATA[Faulting application name: sqlservr.exe]]></category>
		<category><![CDATA[generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION]]></category>
		<category><![CDATA[SQL Server Assertion]]></category>
		<category><![CDATA[SQL Server Assertion: File:]]></category>
		<category><![CDATA[SQL Server EXCEPTION_ACCESS_VIOLATION]]></category>
		<category><![CDATA[SQL Server is terminating because of fatal exception]]></category>
		<category><![CDATA[SQL Server is terminating this process]]></category>
		<category><![CDATA[SqlDumpExceptionHandler]]></category>
		<category><![CDATA[SQLServer EXCEPTION ACCESS VIOLATION]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=954</guid>
		<description><![CDATA[  I have got few request’s from  SQL Server DBA’s in past to blog about analyzing SQL Server exceptions and assertions . After seeing lot of DBA’s getting stuck when they get EXCEPTION_ACCESS_VIOLATION (or) Assertion in SQL ServersI decided to write this blog. This blog is published with intention to make DBA’s analyze and resolve [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=954&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/10/16/sql-server-exception_access_violation-and-sql-server-assertion/feed/</wfw:commentRss>
		<slash:comments>91</slash:comments>
	
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		<title>What is RESOURCE_SEMAPHORE_QUERY_COMPILE?</title>
		<link>http://mssqlwiki.com/2012/10/12/what-is-resource_semaphore_query_compile/</link>
		<comments>http://mssqlwiki.com/2012/10/12/what-is-resource_semaphore_query_compile/#comments</comments>
		<pubDate>Fri, 12 Oct 2012 13:17:56 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Memory]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Query]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[Compile memory SQL Server]]></category>
		<category><![CDATA[CompileMemory]]></category>
		<category><![CDATA[RESOURCE_SEMAPHORE]]></category>
		<category><![CDATA[RESOURCE_SEMAPHORE waits]]></category>
		<category><![CDATA[RESOURCE_SEMAPHORE_QUERY_COMPILE]]></category>
		<category><![CDATA[RESOURCE_SEMAPHORE_QUERY_COMPILE waits in SQL Server]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=890</guid>
		<description><![CDATA[What is RESOURCE_SEMAPHORE_QUERY_COMPILE? Before we understand the RESOURCE_SEMAPHORE_QUERY_COMPILE let us see what is compile memory. Compile memory:&#160; When a query is compiled in SQL Server, the compilation process needs memory (for parsing, algeberaization and optimization) called compile memory. This memory doesn’t include the memory required to execute the query. Challenges with Compile memory:&#160; This memory [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=890&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/10/12/what-is-resource_semaphore_query_compile/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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		<title>SQL Server Parameter sniffing</title>
		<link>http://mssqlwiki.com/2012/10/08/parameter-sniffing/</link>
		<comments>http://mssqlwiki.com/2012/10/08/parameter-sniffing/#comments</comments>
		<pubDate>Mon, 08 Oct 2012 13:46:25 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Optimizer]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[how to troubleshoot parameter sniffing]]></category>
		<category><![CDATA[mssqlwiki]]></category>
		<category><![CDATA[OPTIMIZE FOR UNKNOWN]]></category>
		<category><![CDATA[OPTION (RECOMPILE)]]></category>
		<category><![CDATA[Parameter sniffing]]></category>
		<category><![CDATA[parameter sniffing in stored procedures]]></category>
		<category><![CDATA[parameter sniffing performance issue]]></category>
		<category><![CDATA[parameter sniffing sql server 2008]]></category>
		<category><![CDATA[ParameterCompiledValue. how to troubleshoot parameter sniffing]]></category>
		<category><![CDATA[ParameterRuntimeValue]]></category>
		<category><![CDATA[query optimizer and parameter sniffing]]></category>
		<category><![CDATA[reporting services parameter sniffing]]></category>
		<category><![CDATA[sp_executesql parameter sniffing]]></category>
		<category><![CDATA[SQL Server]]></category>
		<category><![CDATA[sql server parameter sniffing 2008]]></category>
		<category><![CDATA[sql server performance]]></category>
		<category><![CDATA[ssrs parameter sniffing]]></category>
		<category><![CDATA[what is parameter sniffing]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=862</guid>
		<description><![CDATA[When a stored procedure, prepared queries and queries submitted via sp_executesql&#160; is compiled for the first time, the values of the parameters supplied with the execution call are used for cardinality estimation, to optimize the statements within that stored procedure and create the query plan. This is known as parameter sniffing because the optimizer sniffs [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=862&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/10/08/parameter-sniffing/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
	
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		<title>Optimizer Timeout or Optimizer memory abort</title>
		<link>http://mssqlwiki.com/2012/10/07/optimizer-timeout-or-optimizer-memory-abort/</link>
		<comments>http://mssqlwiki.com/2012/10/07/optimizer-timeout-or-optimizer-memory-abort/#comments</comments>
		<pubDate>Sun, 07 Oct 2012 07:39:49 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Query]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server memory]]></category>
		<category><![CDATA["The query processor ran out of internal resources and could not produce a query plan"]]></category>
		<category><![CDATA["The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large numbe]]></category>
		<category><![CDATA[contact Customer Support Services for more information."]]></category>
		<category><![CDATA[Level 16]]></category>
		<category><![CDATA[Line 3"]]></category>
		<category><![CDATA[Msg 8623]]></category>
		<category><![CDATA[Optimizer memory usage abort]]></category>
		<category><![CDATA[Optimizer time out abort]]></category>
		<category><![CDATA[State: 1.]]></category>
		<category><![CDATA[StatementOptmEarlyAbortReason="MemoryLimitExceeded"]]></category>
		<category><![CDATA[StatementOptmEarlyAbortReason="TimeOut"]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=852</guid>
		<description><![CDATA[Optimizer Timeout When the query processor finds itself consuming a lot of time optimizing a query, it may decide to stop the optimization process abruptly, and choose the best available plan. This is to ensure that the optimizer doesn&#8217;t end up optimizing forever. This is&#160; called optimizer timeout (based on the number of plans considered [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=852&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/10/07/optimizer-timeout-or-optimizer-memory-abort/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
	
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		<title>Troubleshooting SQL Server high CPU usage</title>
		<link>http://mssqlwiki.com/2012/10/04/troubleshooting-sql-server-high-cpu-usage/</link>
		<comments>http://mssqlwiki.com/2012/10/04/troubleshooting-sql-server-high-cpu-usage/#comments</comments>
		<pubDate>Thu, 04 Oct 2012 11:07:54 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Configuration]]></category>
		<category><![CDATA[Optimizer]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[cpu performance sql server]]></category>
		<category><![CDATA[cpu usage 100 sql server]]></category>
		<category><![CDATA[cpu usage 100 sqlservr.exe]]></category>
		<category><![CDATA[high cpu usage in sql server]]></category>
		<category><![CDATA[high cpu usage sql server 2005]]></category>
		<category><![CDATA[sql cpu]]></category>
		<category><![CDATA[sql cpu usage]]></category>
		<category><![CDATA[sql cpu usage high]]></category>
		<category><![CDATA[sql cpu utilization]]></category>
		<category><![CDATA[sql server 2005 cpu usage high]]></category>
		<category><![CDATA[sql server 2008 r2 high cpu usage]]></category>
		<category><![CDATA[sql server cpu]]></category>
		<category><![CDATA[sql server cpu 100]]></category>
		<category><![CDATA[sql server cpu usage]]></category>
		<category><![CDATA[sql server cpu usage high]]></category>
		<category><![CDATA[sql server cpu utilization]]></category>
		<category><![CDATA[sql server cpu utilization high]]></category>
		<category><![CDATA[sql server high cpu usage query]]></category>
		<category><![CDATA[SQLServer CPU]]></category>
		<category><![CDATA[troubleshooting high cpu utilization sql server]]></category>
		<category><![CDATA[troubleshooting sql server high cpu]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=843</guid>
		<description><![CDATA[&#160; &#160; Troubleshooting SQL Server high CPU usage &#160; First thing to determine when there is High CPU on systems is, if SQL server is consuming the CPU resource or other applications/service. &#160; Use query in&#160; THIS LINK to get CPU usage history (or) Task manager (or) Perfmon counter to determine that. In Perfmon, Process [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=843&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/10/04/troubleshooting-sql-server-high-cpu-usage/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
	
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		<title>SQL Server Latch &amp; Debugging latch time out</title>
		<link>http://mssqlwiki.com/2012/09/07/latch-timeout-and-sql-server-latch/</link>
		<comments>http://mssqlwiki.com/2012/09/07/latch-timeout-and-sql-server-latch/#comments</comments>
		<pubDate>Fri, 07 Sep 2012 12:53:51 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Debugging]]></category>
		<category><![CDATA[SQL General]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server I/O]]></category>
		<category><![CDATA[A time-out occurred while waiting for buffer latch]]></category>
		<category><![CDATA[Latch timeout]]></category>
		<category><![CDATA[Latch timeout sqlserver]]></category>
		<category><![CDATA[latch timeout stack dump]]></category>
		<category><![CDATA[Latches SQL Server]]></category>
		<category><![CDATA[SQL Server Latch timeout]]></category>
		<category><![CDATA[SQL Server Latches]]></category>
		<category><![CDATA[Timeout occurred while waiting for latch]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=796</guid>
		<description><![CDATA[&#160;&#160; &#160; In a multithreaded process what would happens when a one thread updates a data or index page in memory while second thread is reading the same page? What will happen when 1st&#160; thread reads a data/index page in memory while 2nd thread is freeing the same page from memory? Answer: We would end [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=796&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/09/07/latch-timeout-and-sql-server-latch/feed/</wfw:commentRss>
		<slash:comments>13</slash:comments>
	
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		<title>SQL Server: Ghost records</title>
		<link>http://mssqlwiki.com/2012/08/30/sql-server-ghost-records/</link>
		<comments>http://mssqlwiki.com/2012/08/30/sql-server-ghost-records/#comments</comments>
		<pubDate>Thu, 30 Aug 2012 07:54:51 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[DBCC]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server I/O]]></category>
		<category><![CDATA[Ghost cleanup]]></category>
		<category><![CDATA[Ghost records]]></category>
		<category><![CDATA[GhostCleanupTask]]></category>
		<category><![CDATA[Shrink database do not reclaim space]]></category>
		<category><![CDATA[Space not reclaimed after delete]]></category>
		<category><![CDATA[sql server ghost cleanup]]></category>
		<category><![CDATA[unused space after delete]]></category>
		<category><![CDATA[What is Ghost cleanup task?]]></category>
		<category><![CDATA[What is Ghost record?]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=764</guid>
		<description><![CDATA[&#160; What is Ghost record? When a record is deleted from a clustered index data page or non-clustered index leaf page or a versioned heap page or a forwarded record is recalled, the record is logically removed by marking them as deleted but not physically removed from the page immediately. Pages which are marked as [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=764&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/08/30/sql-server-ghost-records/feed/</wfw:commentRss>
		<slash:comments>9</slash:comments>
	
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		<item>
		<title>I/O requests taking longer than 15 seconds to complete on file</title>
		<link>http://mssqlwiki.com/2012/08/27/io-requests-taking-longer-than-15-seconds-to-complete-on-file/</link>
		<comments>http://mssqlwiki.com/2012/08/27/io-requests-taking-longer-than-15-seconds-to-complete-on-file/#comments</comments>
		<pubDate>Mon, 27 Aug 2012 11:31:18 +0000</pubDate>
		<dc:creator>Karthick P.K</dc:creator>
				<category><![CDATA[Performance]]></category>
		<category><![CDATA[SQL Server Engine]]></category>
		<category><![CDATA[SQL Server I/O]]></category>
		<category><![CDATA[BobMgr::GetBuf: Sort Big Output Buffer write not complete after n seconds.]]></category>
		<category><![CDATA[I/O requests taking longer than 15 seconds to complete on file]]></category>
		<category><![CDATA[PAGEIOLATCH]]></category>
		<category><![CDATA[sql server disk io]]></category>
		<category><![CDATA[SQL Server has encountered NN occurrence]]></category>
		<category><![CDATA[sql server performance]]></category>
		<category><![CDATA[Troubleshooting SQL Server I/O]]></category>

		<guid isPermaLink="false">https://mssqlwiki.wordpress.com/?p=753</guid>
		<description><![CDATA[Do you see warnings like one below in your SQL Server error log? SQL Server has encountered&#160; x occurrence(s) of I/O requests taking longer than 15 seconds to complete on file . The OS file handle is 0x000006A4. The offset of the latest long I/O is: 0&#215;00000 (or) BobMgr::GetBuf: Sort Big Output Buffer write not [&#8230;]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=mssqlwiki.com&#038;blog=23864074&#038;post=753&#038;subd=mssqlwiki&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://mssqlwiki.com/2012/08/27/io-requests-taking-longer-than-15-seconds-to-complete-on-file/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
	
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