Re: bzr commit into mysql-5.1 branch (davi:2746) Bug#35164 Bug#37536

[Konstantin Osipov]

* Davi Arnaut <Davi.Arnaut@stripped> [08/09/30 22:21]:
>  2746 Davi Arnaut	2008-09-30
>       Bug#35164: Large number of invalid pthread_attr_setschedparam calls
>       Bug#37536: Thread scheduling causes performance degradation at low thread
> count
>       
>       Deprecated --skip-thread-priority startup option as newer version of
>       the server won't change the thread priorities by default.
>       
>       Giving threads different priorities might yield marginal improvements
>       in some platforms (where it actually works) but on the other hand it
>       might cause significant degradation depending on the thread count and
>       number of processors. Meddling with the thread priorities is a not a
>       safe bet as it is very dependent on the behavior of the cpu scheduler
>       and system where MySQL is being run.
>       
>       From MySQL 6.0 and up the default behavior is that of not modifying
>       the threads priorities.
> modified:
>   sql/mysqld.cc

OK to push.

--