Here is the command again for running mysql server:
sudo /usr/local/mysql/bin/mysqld_safe –user=mysql &
The documentation would tell you to change the root password immediately but wait until you are through the section about installing Perl support (DBI and DBD::mysql) and run the MYSQLDIR /sql-bench perl run-all-tests.
Both the CPAN installation and run-all-tests expect a blank password for root user.
If you have already changed your password you have two options:
1. force install DBD::mysql (on perl -MCPAN -e shell) OR
2. change your root password back to blank using :-> mysqladmin -u root -p password ”
The test under sql-bench are very processor intensive and take some time so be patient with them. (you might need to do sudo perl run-all-tests).