June 19, 2013

Comment: InnoDB's gap locks

Hi Miguel , I’ve tried your example “the affect gap locks to SELECT … FOR UPDATE ” on my server ,and my results …` of table `test`.`t` trx id 0 27638 lock_mode X insert intention waiting Record lock, heap no 1 PHYSICAL RECORD: n_fields 1… bits 0 0: len 8; hex 73757072656d756d; asc supremum;; —————— The lock_mode is “X insert intention” .

Post: Paul McCullagh answers your questions about PBXT

… an early stage) out performed InnoDB with INSERTS and UPDATES (but not SELECTS). That … no plans to implement InnoDB style “gap locking“. Gap locking effectively involves locking rows that do not exist. This, …few configuration parameters.  Was this an intentional design decision, and do you see it…