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status variables Table_Locks_* status variables Table_Locks_*

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Old 02-28-2008, 06:17 AM
Power, Paul C.
 
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Default status variables Table_Locks_*
Table_Locks_Immediate and Table_Locks_waited.

What does MySQL do exactly to get those values?
Can it be determined what locks had to wait, and why?

-Paul

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  #2 (permalink)  
Old 02-28-2008, 06:17 AM
Baron Schwartz
 
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Default Re: status variables Table_Locks_*
Power, Paul C. wrote:
> Table_Locks_Immediate and Table_Locks_waited.
>
> What does MySQL do exactly to get those values?
> Can it be determined what locks had to wait, and why?
>
> -Paul

As far as I know, no. You should probably ask someone who really knows, but to
my limited understanding, these locks are acquired and released with every query
at the server level, and are not InnoDB lock-related. If you run a SELECT and
examine the values before and after, I think you'll find Table_locks_immediate
increments.

Baron
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