Eliminate INSERT locking in MySQL 5.1 with InnoDB
To get the best locking performance out of InnoDB in 5.1, you’ll want to set the following options (“My Favorite New Feature of MySQL 5.1: Less InnoDB Locking” explains why):
[mysqld]
innodb_autoinc_lock_mode=2
binlog_format=row
tx_isolation=READ-COMMITTED
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