Browse by Tags

• Bad database practices
• Best Practices
• Distributed query
• Linked server
• Performance
• Query Processing
• Security

• Linked servers: permissions and distributed query performance

  In an earlier post , I highlighted that linked server security configuration can have a huge performance impact, and complained that this was not properly documented in SQL Server Books Online and filed a Connectitem for this. Good news is that in Books Read More... Posted Tuesday, November 23, 2010 12:58 AM by Linchi Shea | 8 Comments Filed under: Performance, Best Practices, Query Processing, Distributed query, Linked server, Distributed join

• Bad database practices: abusing linked servers

  In SQL Server, it is rather handy to retrieve data from a different SQL Server instance and use the result locally in another SQL statement for further processing. In theory and in the set purists’ fantasy land, it shouldn’t matter where you get your Read More... Posted Friday, November 06, 2009 8:56 PM by Linchi Shea | 3 Comments Filed under: Performance, Best Practices, Query Processing, Distributed join, Bad database practices

• Performance impact: Linked server security configuration and how it can hurt you

  If you change the security configuration of a linked server from using login UserA to login UserB, would you expect that to significantly impact the performance of a query that uses the linked server, assuming that both users have permission to select Read More... Posted Tuesday, July 21, 2009 2:16 PM by Linchi Shea | 22 Comments Filed under: Performance, Query Processing, Security, Distributed query, Linked server, Distributed join