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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? 2516 John Smith 05/04/2010 12:46AM
Re: How to handle secondary keys in partitioning? 1433 Mattias Jonsson 05/04/2010 01:29PM
Re: How to handle secondary keys in partitioning? 1237 John Smith 05/04/2010 04:30PM
Re: How to handle secondary keys in partitioning? 1465 Mattias Jonsson 05/05/2010 02:20AM
Re: How to handle secondary keys in partitioning? 1377 Rick James 05/06/2010 12:04AM
Re: How to handle secondary keys in partitioning? 1563 Mattias Jonsson 05/06/2010 03:23PM
Re: How to handle secondary keys in partitioning? 1224 John Smith 05/06/2010 10:50PM
Re: How to handle secondary keys in partitioning? 1358 Mattias Jonsson 05/07/2010 02:38AM
Re: How to handle secondary keys in partitioning? 1292 John Smith 05/08/2010 05:31PM
Re: How to handle secondary keys in partitioning? 1402 Mattias Jonsson 05/09/2010 04:37AM
Re: How to handle secondary keys in partitioning? 1271 John Smith 05/09/2010 12:41PM
Re: How to handle secondary keys in partitioning? 1198 Mattias Jonsson 05/09/2010 01:23PM
Re: How to handle secondary keys in partitioning? 1313 Mattias Jonsson 05/12/2010 05:29AM
Re: How to handle secondary keys in partitioning? 1752 John Smith 05/06/2010 12:34AM


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