在Mac OS X v10.6 (Snow Leopard)上,启动MySQL会出现以下错误:

服务器退出,没有更新PID文件

文件my.cnf

[mysqld]
port            = 3306

socket          = /tmp/mysql.sock

skip-external-locking

key_buffer_size = 16K

pid-file=/var/run/mysqld/mysqld.pid

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

当前回答

在我的Homebrew MySQL安装中,我只需要将位于/usr/local/var/mysql/中的ib_logfile0和ib_logfile1移动到另一个目录。

然后我就用mysql了。服务器启动,一切正常。

其他回答

请按照brew install mysql的说明安装mysql。

设置数据库以您的用户帐户运行:

对于MySQL 5.x:

unset TMPDIR
mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp

要在另一个文件夹中设置基表,或者使用不同的用户运行mysqld,请查看mysqld_install_db的帮助:

mysql_install_db --help

查看MySQL文档:

4.4.3 mysql_install_db -初始化MySQL数据目录 2.10.4 MySQL初始帐户安全

对于MySQL 8.x:

unset TMPDIR
mysqld --initialize-insecure --log-error-verbosity --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp

确保上面的数据目录/usr/local/var/mysql为空。必要时备份。

例如,要以“mysql”用户运行,你可能需要sudo:

sudo mysql_install_db ...options...

手动启动mysqld:

mysql.server start

注意:如果失败,您可能忘记运行上面的前两个步骤

对我来说,解决方案是覆盖/纠正/etc/my/cnf中的数据目录

我用自述文件中提供的说明从源代码构建MySQL 5.5.27:


# Preconfiguration setup
shell> groupadd mysql
shell> useradd -r -g mysql mysql
# Beginning of source-build specific instructions
shell> tar zxvf mysql-VERSION.tar.gz
shell> cd mysql-VERSION
shell> cmake .
shell> make
shell> make install
# End of source-build specific instructions

# Postinstallation setup
shell> cd /usr/local/mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> scripts/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql data

# Next command is optional
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> bin/mysqld_safe --user=mysql &

# Next command is optional
shell> cp support-files/mysql.server /etc/init.d/mysql.server

Mysqld_safe在没有解释的情况下自行终止。运行/etc/init.d/mysql.服务器启动导致错误:

服务器退出没有更新PID文件

I noticed something odd in the installation instructions though. It has ownership changed to mysql for the directory "data", but not to "var"; this is unusual because for years I have had to ensure that var directory was mysql writable. So I manually ran chown -R mysql /usr/local/mysql/var and then attempted to start it again. Still no luck. But worse, no .err file in the var dir - it was in the "data" dir! so scripts/mysql_install_db sets up camp in /usr/local/mysql/var, but the rest of the application seems to want to do its work in /usr/local/mysql/data!

所以我只是编辑了/etc/my.cnf,在部分[mysqld]下,我添加了一个指令,显式地将mysql的数据目录指向var(因为我通常期望它是任何方式),这样做之后,mysqld启动得很好。add指令看起来像这样:

数据= /usr/地方/mysql/var

为我工作。希望对你有所帮助。

这招对我很管用:

注意:这是一个硬重新安装。当所有其他选项都用尽时再使用。

在安装了Homebrew的Mac电脑上:

列出运行时存在的所有MySQL实例

brew services

通过运行删除每个实例

brew uninstall <instance_name>

删除/usr/local/var/mysql目录:

rm -rf /usr/local/var/mysql

使用Homebrew重新安装MySQL:

brew install mysql
brew install mysql@<version> #Optional

重新运行mysql。服务器启动:

mysql.server start

试着用 sudo rm -rf /usr/local/var/mysql/ hostnameerr (HOSTNAME是我的主机名)

我的错误文件还告诉我,端口可能正在被另一个进程使用,但只是运行sudo mysql。服务器启动修复了我的问题。