There is almost no reason to use LOCK TABLES on InnoDB tables.
I prefer to have auto_commit=1, then use explicit BEGIN and COMMIT for
clumps of statements that need ACID. I never use auto_commit=0.
Following those two rules, your issue with innodb_table_locks being on
On 4/5/12 11:58 PM, Adarsh Sharma wrote:
> Dear All,
> Today i faced an issue while issuing commands on my innodb tables.
> When I issued any drop table or alter table command my query gets into
> waiting state for more than 15-20 minutes.
> Mysql Version :-5.5.4 community
> I researched on the issue and find that every command try to get lock on
> the table before executing query on it.
> After some R n D , i find and innodb_table_lock parameter in my.cnf.
> After turning it off, my commands are executed with no issue.
> What are the pros& cons of this modification& why it tries to lock
> tables, can anyons have some idea about the issue.
Rick James - MySQL Geek