Re: Very slow insert with Innodb
Posted by:
Rick James
Date: January 05, 2009 07:08PM
Suggest setting innodb_buffer_pool_size to 70% of available RAM if you are using only InnoDB.
Well, even if you take away the auto_increment field or the PRIMARY KEY, InnoDB will still have a PRIMARY KEY. And it will do internal locking on the PK.
The PK will be (in order) chosen from this list:
1. User-stated PRIMARY KEY
2. The first UNIQUE index (with some caveat about NULLable fields)
3. A hidden BIGINT AUTO_INCREMENT -- The worst of all worlds.
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