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@@ -163,7 +163,7 @@ TF8744,TF 8744 disables pre-fetching for the Nested Loop operator,Disable trace
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TF9347,TF 9347 disables batch mode for sort operator,Disable trace flag 9347 for this SQL Server instance. This TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance']",Trace flag 9347 disables batch mode for sort operator. SQL Server 2016 (13.x) introduced a new batch mode sort operator that boosts performance for many analytical queries.,,Server,Windows,OnPremises,"(,13.0)",Warning
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TF9349,TF 9349 disables batch mode for top N sort operator,Disable trace flag 9349 for this SQL Server instance. This TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance']",Trace flag 9349 disables batch mode for top N sort operator. SQL Server 2016 (13.x) introduced a new batch mode top sort operator that boosts performance for many analytical queries.,,Server,Windows,OnPremises,"(,13.0)",Warning
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TF9389,TF 9389 enables dynamic memory grant for batch mode operators,Disable trace flag 9389 for this SQL Server instance. The TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance', 'TempDB']","Trace flag 9389 enables additional dynamic memory grant for batch mode operators. If a query does not get all the memory it needs, it spills data to TempDB, incurring additional I/O and potentially impacting query performance. If the dynamic memory grant trace flag is enabled, a batch mode operator may ask for additional memory and avoid spilling to TempDB if additional memory is available.",,Server,Windows,"OnPremises, ManagedInstance","(,13.0)",Warning
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TF9476,TF 9476 causes SQL Server to generate a plan using the Simple Containment instead of the default Base Containment under New CE,Disable trace flag 9476 for this SQL Server instance. The TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance', 'QueryOptimizer']","Trace flag 9476 causes SQL Server to generate a plan using the Simple Containment assumption instead of the default Base Containment assumption, under the query optimizer cardinality estimation model of SQL Server 2014 (12.x) through SQL Server 2017 versions.",,Server,Windows,OnPremises,"(,13.0)",Warning
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TF9476,TF 9476 causes SQL Server to generate a plan using the Simple Containment,Disable trace flag 9476 for this SQL Server instance. The TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance', 'QueryOptimizer']","Trace flag 9476 causes SQL Server to generate a plan using the Simple Containment assumption instead of the default Base Containment assumption, under the query optimizer cardinality estimation model of SQL Server 2014 (12.x) through SQL Server 2017 versions.",,Server,Windows,OnPremises,"(,13.0)",Warning
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TF9481,"TF 9481 enables Legacy CE model, irrespective of the compatibility level of the database",Disable trace flag 9481 for this SQL Server instance. The TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'QueryOptimizer', 'Performance']","Trace flag 9481 enables you to set the query optimizer cardinality estimation model to the SQL Server 2012 (11.x) and earlier versions, irrespective of the compatibility level of the database.",,Server,Windows,OnPremises,"(,12.0)",Warning
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TF10204,TF 10204 disables merge/recompress during columnstore index reorganization,Disable trace flag 10204 for this SQL Server instance. The TF does not apply to this SQL Server version,"['DefaultRuleset', 'TraceFlag', 'Performance', 'ColumnStore']","Trace flag 10204 disables merge/recompress during columnstore index reorganization. In SQL Server 2016 (13.x), when a columnstore index is reorganized, there is new functionality to automatically merge any small compressed rowgroups into larger compressed rowgroups, as well as recompressing any rowgroups that have a large number of deleted rows.",,Server,Windows,OnPremises,"(,13.0)",Warning
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SPNaming,Stored Procedure Naming,Rename the following stored procedures to get rid of the sp_ prefix: @{ObjectName},"['DefaultRuleset', 'Naming']","In SQL Server, the sp_ prefix designates system stored procedures. If you use that prefix for your stored procedures, the name of your procedure might conflict with the name of a system stored procedure that will be created in the future. If such a conflict occurs, your application might break if your application refers to the procedure without qualifying the reference by schema. In this situation, the name will bind to the system procedure instead of to your procedure.",https://docs.microsoft.com/previous-versions/visualstudio/visual-studio-2010/dd172115(v=vs.100),Database,Windows,"OnPremises, ManagedInstance",,Warning
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@@ -191,4 +191,3 @@ SystemHealth,System Health important messages,Error @{Error_Number} has occured
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RarelyUsedIndex,Rarely used index,Make sure you need index @{IndexName} as it's used too rarely,"['DefaultRuleset', 'Indexes', 'Performance']","Rarely used indexes can slow down database's performance. Time of write operations is increased because of index maintenance, but index is not used quite often. It makes sense to compare impact of writing operations versus rare reading speedup.",https://docs.microsoft.com/sql/t-sql/statements/drop-index-transact-sql,Database,/^(Windows|Linux)$/,"OnPremises, ManagedInstance",,Warning
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UnusedIndex,Unused index,Make sure you need index @{IndexName} as it's unused,"['DefaultRuleset', 'Index', 'Performance']","Unused indexes can slow down database's performance. Time of write operations is increased because of index maintenance, but index is not used anywhere.",https://docs.microsoft.com/sql/t-sql/statements/drop-index-transact-sql,Database,/^(Windows|Linux)$/,"OnPremises, ManagedInstance",,Warning
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SkewedCompatibilityLevel,Database with skewed compatibility level,Update database compatibility level (current level: @{CompatibilityLevel}),"['DefaultRuleset', 'CompatibilityLevel', 'Security', 'Performance', 'UpdateIssues']",Some databases may have a compatibility level lower than the allowed level by the Database Engine.,https://docs.microsoft.com/sql/t-sql/statements/alter-database-transact-sql-compatibility-level,Database,/^(Windows|Linux)$/,,,Warning
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