如何重新启动mysql以及my.cnf文件在哪里

Question

I am using a Mac OS X Snow Leopard Apple computer.

I installed MySQL on my machine using instructions mentioned here . Everything works great. However I have two questions.

1. Where is my.cnf file? I searched the whole file system and result is empty. Is it possible that there is no my.cnf and MySQL works with default values. If yes then probably I should create my.cnf at /etc/mysql . Is that right?

2. How do I restart the MySQL server ? I know it gets started when I restart my machine. Here is what plist looks like. mysqld_safe does not let me restart server.

   KeepAlive Label com.mysql.mysqld Program /usr/local/mysql/bin/mysqld_safe RunAtLoad UserName mysql WorkingDirectory /usr/local/mysql

Answer 1

From the example my.cnf that comes with mysql:

# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is /usr/local/mysql/data) or
# ~/.my.cnf to set user-specific options.

On my OS X 10.4 instance, my.cnf is at /etc/my.cnf.

To restart mysql, use mysqladmin to shut it down and then start it up again with mysqld_safe:

/usr/local/mysql/bin/mysqladmin -uroot -p shutdown
sudo /usr/local/mysql/bin/mysqld_safe &

Answer 2

You haven't told us what OS you're on, but the defaults on Debian Linux are:

/etc/init.d/mysql restart

for restart, and the my.cnf file is located at /etc/mysql/my.cnf

Answer 3

1. It possible it doesn't exist. You can create one in /etc/my.cnf or in your datadir (usually /var/lib/mysql or /usr/local/var ).

2. I usually use mysqladmin shutdown (might need a -p if you have a password set) and then a sudo mysqld_safe & to start it up.