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Recent Stories (MySQL)
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Periodically I cause havoc for my development machine and this fix comes in handy.

Thursday, January 07, 2010 @ 4:50 pm   2453 Views   CoderTakeoutGuy   Like
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While trying to optimize a MySQL query, I ran into a problems trying to avoid MySQL and disk caching which was making it impossible to accurately benchmark two different queries. Fortunately, I was running MySQL on a Centos box and this enabled me to run two quick commands that provided a "fresh" enviornment for each query benchmark.

echo 3 > /proc/sys/vm/drop_caches
service mysql restart

The first command clears the disk cache. The second restarts MySQL. Now, each query can be evaluated on its merits and not how well MySQL and Centos try to optimize performance.

Sunday, September 20, 2009 @ 7:17 pm   2584 Views   CoderTakeoutGuy   Like
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This just describes how MySQL uses single index there are more complex rules of how indexes will be used if you look at multiple indexes usage with index merge Using Index to Sort Data Another great benefit of BTREE index is it allows to retrieve data in sorted form hence avoiding external sort process for executing of queries which require sorting.
Saturday, September 12, 2009 @ 7:20 pm   2481 Views   CoderTakeoutGuy   Like
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This is still my favorite MySQL data tool...

With 8.1 we have made the following GUI changes: Added an option to 'preview SQL' in CREATE/ALTER TABLE Column width in all GRIDs (not only DATA and RESULT tabs) are now persistent New GUI for defining ENUM and SET columns in Create/Alter GUI Some reorganizations of menus, improved captions and explanations in dialogues and wizards etc Needless to say, this release contains many bug fixes, UI improvements and minor features.
Wednesday, June 03, 2009 @ 7:04 pm   723 Views   CoderTakeoutGuy   Like
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