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Re: How to handle secondary keys in partitioning?
Posted by: John Smith ()
Date: May 06, 2010 10:50PM

Mattias,

Thanks.

One more question:

Does partitioning help concurrent inserts/updates?

I was under the impression that it does. But then I read this:
http://datacharmer.blogspot.com/2010/05/two-quick-performance-tips-with-mysql.html

"Whenever you insert a record, the partitioning engine locks the entire table."

It it is true that MySQL locks the entire partitioned table for inserts, then all writes are being serialized. That'd mean partitioned tables would have much worse insert/update performance than an unpartitioned table which uses row-level instead of table-level locks.

Could you clarify this? Thanks

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Subject Views Written By Posted
How to handle secondary keys in partitioning? 2478 John Smith 05/04/2010 12:46AM
Re: How to handle secondary keys in partitioning? 1421 Mattias Jonsson 05/04/2010 01:29PM
Re: How to handle secondary keys in partitioning? 1222 John Smith 05/04/2010 04:30PM
Re: How to handle secondary keys in partitioning? 1449 Mattias Jonsson 05/05/2010 02:20AM
Re: How to handle secondary keys in partitioning? 1373 Rick James 05/06/2010 12:04AM
Re: How to handle secondary keys in partitioning? 1551 Mattias Jonsson 05/06/2010 03:23PM
Re: How to handle secondary keys in partitioning? 1207 John Smith 05/06/2010 10:50PM
Re: How to handle secondary keys in partitioning? 1347 Mattias Jonsson 05/07/2010 02:38AM
Re: How to handle secondary keys in partitioning? 1282 John Smith 05/08/2010 05:31PM
Re: How to handle secondary keys in partitioning? 1391 Mattias Jonsson 05/09/2010 04:37AM
Re: How to handle secondary keys in partitioning? 1265 John Smith 05/09/2010 12:41PM
Re: How to handle secondary keys in partitioning? 1180 Mattias Jonsson 05/09/2010 01:23PM
Re: How to handle secondary keys in partitioning? 1299 Mattias Jonsson 05/12/2010 05:29AM
Re: How to handle secondary keys in partitioning? 1742 John Smith 05/06/2010 12:34AM


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