renice and Mysql

I read the following at http://dev.mysql.com/doc/mysql/en/li...-install.html:

We have discovered that it is essential to run the mysqld process with the highest possible priority on the 2.4 kernel to achieve maximum performance. This can be done by adding a renice -20 $$ command to mysqld_safe. In our testing on a four-CPU machine, increasing the priority resulted in a 60% throughput increase with 400 clients.
Does this still apply? If so, why haven't I heard this being discussed on WHT or elsewhere as I would think this could have a big impact on performance.

Should "renice -20 $$" be placed in my.cnf?

Thanks.

 

 

 

 

Top