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Re: timestamp, datetime as default value as current_timestamp [PARTITION]
Posted by: Mattias Jonsson
Date: August 31, 2012 06:00PM

> Inserting single rows in partitions is slow. Whenever you insert a record, the partitioning engine locks the entire table (all-partitions), the partitioning engine will lock all partitions before the insert, and unlock them after the insert.

Have you tested this with 5.6.6? It now prunes partitioning lock requests too and includes pruning on inserts too, i.e. fixed the old bug#37252.

Also partitioning does add any table lock, it simply forwards the lock request to the partitions (which gave a big overhead for small queries before 5.6.6, since it had to forward the request to all partitions every time). But for InnoDB there where never any table lock from partitioning!

Mattias Jonsson, MySQL Partitioning developer

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Re: timestamp, datetime as default value as current_timestamp [PARTITION]
August 31, 2012 06:00PM

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