Blog: SQL performance (sqlsentry)


210 blogs updated: 42 min. ago
Optimization Thresholds - Grouping and Aggregating Data, Part 5
In the conclusion of his series on grouping and aggregation costs, Itzik Ben-Gan reveals some of the math behind seek vs. scan decisions. Th...
0
09-08-2018 14:35:06 SQL performance (sqlsentry) SQL Server
Azure SQL Database Performance and Service Tiers Explained
Glenn Berry of SQLskills.com describes the different tiers for Azure SQL Database, and what you get for your money in each case. The post Az...
0
01-08-2018 16:11:46 SQL performance (sqlsentry) SQL Server
Performance Myths: The query result cache
Andy Mallon dispels the myth that SQL Server maintains some kind of query result cache to make future executions of the same query faster. T...
3
23-07-2018 16:46:50 SQL performance (sqlsentry) SQL Server
Tracking down high CLR_MANUAL_EVENT waits
Jonathan Kehayias of SQLskills.com describes how he got to the bottom of an uncommon situation with high CLR_MANUAL_EVENT waits. The post Tr...
0
18-07-2018 14:50:21 SQL performance (sqlsentry) SQL Server
Optimization Thresholds - Grouping and Aggregating Data, Part 4
In the fourth installment of his series on optimization thresholds, Itzik Ben-Gan looks at how SQL Server applies costs to parallel operatio...
0
11-07-2018 15:21:36 SQL performance (sqlsentry) SQL Server
Join Elimination: When SQL Server Removes Unnecessary Tables
For his first guest post on SQLPerformance.com, Bert Wagner describes the pros and cons of join elimination in SQL Server. The post Join Eli...
3
18-06-2018 13:51:13 SQL performance (sqlsentry) SQL Server
Optimization Thresholds - Grouping and Aggregating Data, Part 3
Itzik Ben-Gan dissects the Hash Match (Aggregate) algorithm in his latest post in a series on SQL Server optimization thresholds. The post O...
3
13-06-2018 11:58:13 SQL performance (sqlsentry) SQL Server
The Importance of Baselines
Tim Radney goes into detail about why baselines are important, and how metrics you collect now can help you solve future problems. The post ...
3
24-05-2018 15:35:21 SQL performance (sqlsentry) SQL Server
Optimization Thresholds - Grouping and Aggregating Data, Part 2
Continuing his series on optimization thresholds, Itzik Ben-Gan dives into the calculations behind stream aggregate costing when the data ne...
0
09-05-2018 14:11:43 SQL performance (sqlsentry) SQL Server
Reasons to Upgrade to SQL Server 2017
Glenn Berry discusses a number of compelling reasons why, if you are choosing between SQL Server 2016 or SQL Server 2017, you should choose ...
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23-04-2018 15:02:06 SQL performance (sqlsentry) SQL Server


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