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Comparing a Good and a Bad Plan for One Query in Query Store

December 3, 2019
Pinal Dave
SQL Performance
Execution Plan, Query Store, SQL Performance, SQL Server

Compare a good and a bad plan in Query Store using runtime history, SSMS Compare Showplan, estimates, joins, grants, and parallelism.

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Feedback Disabled

SQL SERVER – Memory Grant Feedback – No Feedback Disabled

November 29, 2019
Pinal Dave
SQL Performance
Execution Plan, SQL Memory, SQL Scripts, SQL Server

Let us discuss MemoryGrantInfo when the value of the IsMemoryGrantFeedbackAdjusted property displays No Feedback Disabled.

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IsMemoryGrantFeedbackAdjusted

SQL SERVER – Memory Grant Feedback – MemoryGrantInfo and IsMemoryGrantFeedbackAdjusted

November 28, 2019
Pinal Dave
SQL Performance
Execution Plan, SQL Memory, SQL Scripts, SQL Server

We will discuss a very interesting topic of Memory Grant Feedback along with MemoryGrantInfo and IsMemoryGrantFeedbackAdjusted in the execution plan. 

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batch mode

SQL SERVER – Batch Mode in RowStore – Performance Comparison

November 21, 2019
Pinal Dave
SQL Performance
ColumnStore Index, Compatibility Level, Execution Plan, SQL Scripts, SQL Server, SQL Server 2019

Let us see in this blog post the performance comparison between Batch Mode and Row Mode. The most asked question was about the Performance difference.

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Finding Regressed Queries in Query Store After a Deployment

November 20, 2019
Pinal Dave
SQL Performance
Execution Plan, Query Store, SQL CPU, SQL Server

Find regressed queries in Query Store using weighted before-and-after duration and CPU, then compare plans and changed procedure text.

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In a farm apple store, a hand searches a loose bin of apples beside a rack of apples laid in neat rows.

RID Lookups on Heaps vs Key Lookups on Clustered Tables

November 9, 2019
Pinal Dave
SQL Performance
Clustered Index, Execution Plan, SQL Heap, SQL Index, SQL Server

Compare RID lookups on heaps with clustered key lookups, inspect forwarded records, and test covering indexes with actual plans and reads.

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Performance Insight

Configure Azure SQL Database Performance Insight – Analyzing SQL Server Query Plans – Part 5

November 8, 2019
Pinal Dave
SQL Tips and Tricks
Execution Plan, Pluralsight, SQL Azure, SQL Server

Let us discuss different aspects of Analyzing SQL Server Query Plans. We will discuss how to configure Azure SQL Database Performance Insight.

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