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All About Data,Analytics and Databases

Monthly Archive: March 2010

  • March 28, 2010

Dell MD1120 Storage Array Performance

3

Here is some file IO performance numbers from DELL MD1120 SAS storage array. Last year I did the same test with HP P800 storage array and numbers were impressive. But[…]

Database · Hardware · MySQL · Scalability

  • March 21, 2010

Hyper Threading Performance

12

Its been a while anyone talked about Intel’s Hyper-Threading performance when it comes to databases. There were enough posts about disabling Hyper-Threading  completely when it comes to MySQL/InnoDB workloads way[…]

Database · MySQL · NoSQL · Scalability

  • March 8, 2010

When indexes are created in internal temporary tables

2

During my previous post on how to improve derived tables performance, I patched the code to add indexes on internal derived table results, which made a huge difference in the[…]

Database · MySQL

  • March 6, 2010

How to improve subqueries derived tables performance

20

Last week; I was working on one of the issue where the sub-query related to OLAP staging was running for about 2+ hours in the production server and finally nailed[…]

Database · MySQL

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