DBCC TRACEOFF (3226, -1) īy default, every successful backup operation adds an entry in the SQL Server error log and in the system event log. Using below T-SQL to turn off the two flags. Suggest you turning off the two trace flags before doing a migration. Session trace-flags are not yet supported in Managed Instance. For this fix, it may happen for future Cumulative Updates and the next Service Pack.Azure SQL Managed Instance supports the following global Trace Flags: 460, 2301, 2389, 2390, 2453, 2467, 7471, 8207, 9389, 10316, and 11024. After some time, when we see stable behavior after the Hotfix, we remove trace flag protection for some fixes and make them active by default. “The reason for protecting a change by a trace flag is to make sure we do not regress any other cases if the change may affect query plan choice. Please, note the mentioned Hotfix requires special trace flag 4134 to be enabled in order to take effect.” Even that the symptom described in that KB is different, the root cause is the same. Parallel insert plan causes Primary Key Violation SQLCrossJoin_TraceFlagRepository_v5 (pdf)Īnother one for you – T4134 that addresses some wrong results and primary key error conditions with parallel plans.įIX: You receive an incorrect result when you run a query that uses the row_number function in SQL Server 2008 or in SQL Server 2008 R2įIX: Results may change every time that you run a parallel query in SQL Server 2005, in SQL Server 2008, or in SQL Server 2008 R2 if the query uses a ranking function and if the computer has eight or more CPUs SQLCrossJoin_TraceFlagRepository_v6 (pdf) The primary audience for the attached PDF was originally “me”, but I certainly want this to be helpful to the SQL Server community at large, and welcome your feedback! My ultimate goal is to have an intuitive categorization of flags (as many as is possible/reasonable), each with relevant links to trustworthy whitepapers/blogs/etc. If you see flags that are not present in the document, or have links to informative content or useful application for a specific flag, please post below in the comments and I’ll incorporate into the document. I’ve since been adding flags that I discover in blogs, whitepapers, or even print, and will continue to incorporate flags as I stumble onto them in KB articles, blog posts, Connect items, and such. Thus, I decided to start putting my own together by starting with the SQL Server Central list and categorizing by areas of the DB engine (e.g.
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