THE SQL Server Blog Spot on the Web

Welcome to SQLblog.com - The SQL Server blog spot on the web Sign in | |
in Search

Browse by Tags

All Tags » internals » Seeks   (RSS)
  • SQL Server, Seeks, and Binary Search

    The following table summarizes the results from my last two blog entries, showing the CPU time used when performing 5 million clustered index seeks: In test 1, making the clustered index unique improved performance by around 40%. In test 2, making the same change reduced performance by around 70% (on 64-bit systems – more on that later).  ...
    Posted to Paul White: Page Free Space (Weblog) by Paul White on August 8, 2011
  • Seeking Without Indexes

    A seek can contain one or more seek predicates – each of which can either identify at most one row in a unique index (a singleton lookup) or a range of values (a range scan).  When looking at a query plan, we will often need to look at the details of the seek operator in the Properties window to see how many operations it is performing, and ...
    Posted to Paul White: Page Free Space (Weblog) by Paul White on February 17, 2011
  • A Tale of Two Index Hints

    If you look up Table Hints in Books Online, you’ll find the following statement: If a clustered index exists, INDEX(0) forces a clustered index scan and INDEX(1) forces a clustered index scan or seek. If no clustered index exists, INDEX(0) forces a table scan and INDEX(1) is interpreted as an error. The interesting thing there is ...
    Posted to Paul White: Page Free Space (Weblog) by Paul White on September 22, 2010
Powered by Community Server (Commercial Edition), by Telligent Systems
  Privacy Statement