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1月 29 2019

mysql 5.6.40 修改最大连接数

如果通过修改my.cnf 的方式不起作用,一般是和系统有关系。试试下面的方法

修改文件:

append these two lines to /etc/security/limits.conf

mysql hard nofile 65535
mysql soft nofile 65535
append this line to /usr/lib/systemd/system/mysqld.service (in the [service] section)

LimitNOFILE=65535
then finally reboot and check that those error messages have disappeared from your mysql error log.

I would not recommend to edit the original systemd file as it will be overwritten during updates.

To modify the limits, do the following:

mkdir /etc/systemd/system/mysqld.service.d
Inside that directory, create new file limits.conf and add the following to that file:

[Service]
LimitNOFILE = 65535
finally reload systemd with:

systemctl daemon-reload
and restart mysqld to enable the change:

systemctl restart mysqld
Now validate that the change was successful by using the following query:

mysql> show variables like '%file%';
You should find a line like this:

| open_files_limit | 65535
That's it, this way your changes survive MySQL updates.

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