{"id":517,"date":"2011-11-27T18:45:00","date_gmt":"2011-11-27T18:45:00","guid":{"rendered":"\/blogs\/bobb\/post\/Per-appdomain-diagnostic-info-in-SQL-Server-2012-SQLCLR.aspx"},"modified":"2013-01-03T23:59:29","modified_gmt":"2013-01-04T07:59:29","slug":"per-appdomain-diagnostic-info-in-sql-server-2012-sqlclr","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/bobb\/per-appdomain-diagnostic-info-in-sql-server-2012-sqlclr\/","title":{"rendered":"Per-appdomain diagnostic info in SQL Server 2012 SQLCLR"},"content":{"rendered":"<p>\nIn SQL Server 2012, SQLCLR now loads .NET 4.0 code rather than .NET 2.0 as in previous versions of SQL Server.\n<\/p>\n<p>\nNote that the &quot;main system&quot; assemblies (e.g. mscorlib.dll, System.Data.dll) in .NET did not appear as a separate directory, between version 2.0 and 4.0; instead, the .NET 2.0 librares were updated. As an example, SQL Server 2008 loads the .NET 3.5 SP1 versions of the &quot;main system&quot; assemblies, but these are numbered as version 2.0.50727.xxxx. On my machine the 2.0 version of mscorlib.dll is actually version 2.0.50727.5420. The &quot;original&quot; version 2.0 mscorlib.dll (that shipped with SQL Server 2005 RTM) was 2.0.50727.42. See one of my <a href=\"http:\/\/3.209.169.194\/blogs\/bobb\/sql-server-2008-and-clients-the-long-story\/\" class=\"broken_link\">previous blog posts<\/a> for more information on .NET versioning in general. Even through this post references clients, the same versioning (in .NET 2.0-3.5)&nbsp;applies to SQLCLR as well.\n<\/p>\n<p>\nMoving SQLCLR up to version 4.0 allows collection of some additional per-appdomain diagnostic information. In SQL Server 2012, this information appears in 3 additional columns in the DMV sys.dm_clr_appdomains. You can now monitor, on a per-appdomain basis, <strong>total_processor_time_ms<\/strong>, <strong>total_allocated_memory_kb<\/strong> (all memory allocations made since the appdomain was started, without subtracting garbage-collected memory) and <strong>survived_memory_kb<\/strong> (memory that survived the last full blocking garbage collection, referenced by the current appdomain).\n<\/p>\n<p>\nI&#39;ve been looking at these and gotten one particularly interesting result, so far. The master.sys[runtime].1 appdomain (the one where spatial data types and other system CLR items run) shows total_allocated_memory_kb = 0 and survived_memory_kb = 356 immediately after SQL Server 2012 starts up. It looks odd to have &quot;surviving&quot; memory for an appdomain that hasn&#39;t reported any allocated; I&#39;ll have to look more closely at the allocations to figure out how that could be.\n<\/p>\n<p>\nRunning the following code:<br \/>\ndeclare @a geometry = &#39;POINT(1 1)&#39;;\n<\/p>\n<p>\nloads the spatial library (Microsoft.SqlServer.Types.dll) and results in a more believable total_allocated_memory_kb = 543, survived_memory_kb = 356.\n<\/p>\n<p>\nThis additional information should be helpful for DBAs and developers troubleshooting SQLCLR behaviors.\n<\/p>\n<p>\n@bobbeauch<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In SQL Server 2012, SQLCLR now loads .NET 4.0 code rather than .NET 2.0 as in previous versions of SQL Server. Note that the &quot;main system&quot; assemblies (e.g. mscorlib.dll, System.Data.dll) in .NET did not appear as a separate directory, between version 2.0 and 4.0; instead, the .NET 2.0 librares were updated. As an example, SQL [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,38],"tags":[],"class_list":["post-517","post","type-post","status-publish","format-standard","hentry","category-sql-server-2012","category-sqlclr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.9.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Per-appdomain diagnostic info in SQL Server 2012 SQLCLR - Bob Beauchemin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sqlskills.com\/blogs\/bobb\/per-appdomain-diagnostic-info-in-sql-server-2012-sqlclr\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Per-appdomain diagnostic info in SQL Server 2012 SQLCLR - Bob Beauchemin\" \/>\n<meta property=\"og:description\" content=\"In SQL Server 2012, SQLCLR now loads .NET 4.0 code rather than .NET 2.0 as in previous versions of SQL Server. 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