Approach for better performance and queries
HelloIf I had two requests and they used as source an underlying query, better performance to create another underlying query for the second query?
Ben
Benton says:
If I had two requests and they used as source an underlying query, better performance to create another underlying query for the second query?
Which would reduce I/O?
Because that is what SQL performance tuning is usually about. E/s is slower and more expensive operation. Results of the huge hit to performance. This set of queries mean used these queries less i/o - a better way of I/O, which allows the query to obtain the required data using less I/O.
So in this context, your question seems absurd... Why get a "+ alternate copy + ' a subquery used, improve the performance of the 2nd query? It is not a question of the subquery have to redouble their efforts because it is used by both applications. It's about designing logically correct queries (which applies the correct thinking to produce correct results) and writing to use roads I/O best available such as implemented in the database data model.
Tags: Database
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Original title: HELP
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Method 1:
I suggest you to start the computer in a clean boot state and check if any third-party application may be the cause of the problem.
This could happen if one of the substantive programmes is in conflict with the proper functioning of your computer. To help resolve the error and other messages, you can start Windows 7 by using a minimal set of drivers and startup programs. This type of boot is known as a "clean boot". A clean boot helps eliminate software conflicts.
How to troubleshoot a problem by performing a clean boot in Windows Vista or Windows 7 http://support.microsoft.com/kb/929135
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Method 2:
I also suggest you go through the steps mentioned in the link and the Coachman.
Optimize the performance of Microsoft Windows Vista
http://support.Microsoft.com/kb/959062
Optimize Windows Vista for better performance
http://Windows.Microsoft.com/en-GB/Windows-Vista/optimize-Windows-Vista-for-better-performance
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