I installed MySQL using homebrew brew install mysql
, and I noticed that MySQL can be managed with two different methods:
brew services start mysql
andmysql.server start
Is there any difference when starting the service using brew services vs starting it with the normal mysql.server method? Or are they basically the same thing, just a different alias?
It appears they both use the same executable: /usr/local/Cellar/mysql/5.7.17/bin/mysqld
Thank you for the help!
According to the help message of brew services
, when you run
brew services start mysql
it installs and starts the service formula at login (or at boot if you run the command with sudo
). It means you will have now a plist file in ~/Library/LaunchAgents
(or in /Library/LaunchDaemons
if you run the command with sudo
). For mysql, the plist file is the following:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>KeepAlive</key>
<true/>
<key>Label</key>
<string>homebrew.mxcl.mysql</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/opt/mysql/bin/mysqld_safe</string>
<string>--bind-address=127.0.0.1</string>
<string>--datadir=/usr/local/var/mysql</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>WorkingDirectory</key>
<string>/usr/local/var/mysql</string>
</dict>
</plist>
it means that by default mysqld_safe
is called with the --bind-address=127.0.0.1
and --datadir=/usr/local/var/mysql
command line options.
when you run
mysql.server start
you directly execute the mysql script located in /usr/local/bin/mysql.server
.
The main difference is that with the brew services
version, you run mysqld_safe
which, according to its man
page:
adds some safety features such as restarting the server when an error occurs and logging runtime information to an error log file.
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