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Re: long running, can't get to use index
Posted by: Peter Brawley
Date: March 24, 2017 10:32AM

General factors: InnoDB table? What is innodb_buffer_pool_size, how much RAM is available to MySQL, does running Analyze Table (to update stats) make a diff?

Specifics: If the table has index(r_userid,r_create_tm,r_status,r_type), you FORCE this index, and yet performance does not much improve, I think you've shown that the optimiser was right in estimating that a table scan would perform just about as well.

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long running, can't get to use index
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Eric Peterson
March 24, 2017 10:10AM
Re: long running, can't get to use index
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Peter Brawley
March 24, 2017 10:32AM
Re: long running, can't get to use index
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Eric Peterson
March 24, 2017 10:41AM
Re: long running, can't get to use index
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Peter Brawley
March 27, 2017 10:39AM
Re: long running, can't get to use index
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Øystein Grøvlen
March 27, 2017 02:04AM
Re: long running, can't get to use index
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Eric Peterson
April 03, 2017 10:34AM
Re: long running, can't get to use index
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Peter Brawley
April 03, 2017 12:08PM
Re: long running, can't get to use index
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Benoit St-Jean
May 06, 2017 07:36PM


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