{"id":869,"date":"2006-03-23T18:28:00","date_gmt":"2006-03-23T18:28:00","guid":{"rendered":"\/blogs\/bobb\/post\/Poking-at-SQLCLR.aspx"},"modified":"2006-03-23T18:28:00","modified_gmt":"2006-03-23T18:28:00","slug":"poking-at-sqlclr","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/bobb\/poking-at-sqlclr\/","title":{"rendered":"Poking at SQLCLR"},"content":{"rendered":"<p>\nA common question on the newsgroups is &quot;what will happen if a SQLCLR procedure allocates a huge chunk of memory or enters a tight, endless loop&quot; by mistake? DBAs are concerned about any language with a looping construct (they&#39;ve likely coded the tight, endless loop in T-SQL to see) or a malloc or equivalent. The BOL suggests any loop should call Sleep(0) but sleeping is not always the same as yielding.\n<\/p>\n<p>\nSQL Server 2005 does respond to memory pressure in a concerted manner releasing buffers and ending procedures&nbsp;if needed. So you might see an error similar to this under memory pressure or if you allocate &quot;too much memory&quot;:\n<\/p>\n<p>\nMsg 6532, Level 16, State 49, Procedure MyProc, Line 0<br \/>\n.NET Framework execution was aborted by escalation policy because of out of memory.\n<\/p>\n<p>\nHowever, SQL Server doesn&#39;t consider &quot;being busy&quot; an error condition. Suppose&nbsp;there was a batch process that actually did run for a long time? In the case of the endless loop, if the server has other&nbsp;work to do, SQL Server 2005 will force a CLR thread to yield and &quot;punish&quot; it (timeslice-wise). This is visible using a dynamic management view, sys.dm_clr_tasks, in the field &quot;force_yield_count&quot;. When in an endless loop, this field increases, but SQL Server does not kill the task.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A common question on the newsgroups is &quot;what will happen if a SQLCLR procedure allocates a huge chunk of memory or enters a tight, endless loop&quot; by mistake? DBAs are concerned about any language with a looping construct (they&#39;ve likely coded the tight, endless loop in T-SQL to see) or a malloc or equivalent. The [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-869","post","type-post","status-publish","format-standard","hentry","category-sqlclr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.9.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Poking at 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\/poking-at-sqlclr\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Poking at SQLCLR - Bob Beauchemin\" \/>\n<meta property=\"og:description\" content=\"A common question on the newsgroups is &quot;what will happen if a SQLCLR procedure allocates a huge chunk of memory or enters a tight, endless loop&quot; by mistake? DBAs are concerned about any language with a looping construct (they&#039;ve likely coded the tight, endless loop in T-SQL to see) or a malloc or equivalent. 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