How do i open mysql configuration file?

On Windows

MySQL starts up with configurations defined in a file named “my.ini”.  To find where the active “my.ini” configuration file is located on the Windows Server:

Step 1) Open Windows Services (e.g. start –> run –> “services.msc”)

Step 2) Find the appropriate MySQL Service entry (e.g. “MySQL” or “MySQL56”), in this example it’s “MySQL80-3307”

How do i open mysql configuration file?

Step 3) Right click and select Properties

Under the text “Path to executable”, the path to the “my.ini” file shown next to the parameter “–defaults-file”

In this example, the location of the my.ini file is:

C:\ProgramData\MySQL\MySQL Server 8.0\my.ini

How do i open mysql configuration file?

On Linux

MySQL starts up with configurations defined in a file named “my.cnf”.  

To find where the active “my.cnf” configuration file is located on the Linux Server:

Step 1) From a Terminal/Shell/Command Line, execute the command: mysql –verbose –help

The command will yield a long list of text as the result.  

Step 2) Scroll to below the “Usage: mysql [OPTIONS] [database] section” and below the line that reads: “Default options are read from the following files in the given order:“, there will be an ordered list of possible filesystem locations for the my.cnf file.  In this example, there are 4 locations will which MySQL will look for.  

/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf

To made configuration changes, modify the first available file (from left to right), in this example this would be “/etc/my.cnf”

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MySQL can read configuration files from different locations, which depend on configuration, platform and build options. Steps below will show a universal approach to list all locations where the configuration file is being looked.

1. Make sure that mysqld process is started without explicit –defaults-file or –defaults-extra-file parameters. Following commands will display actual arguments mysqld is started with:

Linux:

Solaris:

$ /usr/ucb/ps -alxwww | grep mysqld

Windows:

Command line arguments are observed in Task Manager when column ‘Command line’ is enabled. (View->’Select Columns’ menu option).

2. Following command will show locations where mysqld process reads configuration files:

Please note that if your MySQL server startup command uses any of options –datadir or –basedir explicitly, you should append them to the list of parameters in the command below to see locations of configuration files.

Unix-like systems:

$ mysqld --help --verbose 2>1 | grep "/my.cnf"

Windows:

% mysqld --help --verbose --console 2>1 | findstr "my.ini"

3. If the command above brings no output, it may be needed to specify the full path to mysqld binary (found in step 1.).

4. If still no success, you may capture output of following command into text file:

$ mysqld --help --verbose

Then look for locations after the following message: “Default options are read from the following files in the given order:

mysql configuration file location linux ubuntu debian

/etc/mysql/mysql.cnf

mysql configuration file location in windows

(/usr/local/mysql-router/mysqlrouter.conf)
/Users/philip/.mysqlrouter.conf

mysql configuration file location mac

/etc/mysql/my. cnf.

centos fedora redhat mysql config file location

/etc/mysql/my. cnf.

validate mysql config file or syntax error check

There is a way check syntax errors in mysql.cnf file

MySQL 8.0.16, a new option called ‘validate-config’ has been introduced to help users to quickly test the server configuration without having to run the server.

mysqld –validate-config

root@-s-4vcpu-8gb-blr1-01:~# mysqld –validate-config
root@-s-4vcpu-8gb-blr1-01:~#

just like nginx and apache nginx -t ,

check mysql server config file variable in command line

mysql show variables

mysql -u root -p

mysql> SHOW VARIABLES;

SHOW VARIABLES LIKE ‘innodb_buffer_pool_size’;

mysql> SHOW VARIABLES LIKE ‘innodb_buffer_pool_size’;
+————————-+———–+
| Variable_name | Value |
+————————-+———–+
| innodb_buffer_pool_size | 134217728 |
+————————-+———–+
1 row in set (0.01 sec)

mysql>

after restart

mysql> SHOW VARIABLES LIKE ‘innodb_buffer_pool_size’;
+————————-+———–+
| Variable_name | Value |
+————————-+———–+
| innodb_buffer_pool_size | 536870912 |
+————————-+———–+
1 row in set (0.01 sec)

Start / stop / restart Reload mysql config file server

service mysql reload

systemctl reload mysqld

/etc/mysql/my.cnf error

service mysql start
service mysql stop

service mysql restart   // ubuntu debian

service mysqld restart

/etc/init.d/mysqld restart

# The MySQL Community Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with ‘.cnf’, otherwise they’ll be ignored.
#
!includedir /etc/mysql/conf.d/

mysql default configuration values in mysql 8

mysql sample configuration

[mysql]
default-character-set=utf8mb4
[mysqld]
default_authentication_plugin= mysql_native_password
# Skip reverse DNS lookup of clients
skip-name-resolve
#Disable all remote connections
skip-networking
#innodb_buffer_pool_size = 1073741824
#innodb_log_file_size = 256M # 25% of buffer pool size
innodb_buffer_pool_size = 512M
innodb_log_file_size = 128M # 25% of buffer pool size

open_files_limit = 30000 # would be reasonable
table_open_cache = 8000
tmp_table_size = 128M
max_heap_table_size = 128M
innodb_write_io_threads= 4
innodb_read_io_threads = 8
join_buffer_size = 512
slow_query_log = /var/log/mysql/mysql-slow.log
long_query_time = 1
log-queries-not-using-indexes = 1
[mysqld]

How do I open a MySQL config file?

Support Network.
Find the configuration files. By default, you can find the MySQL® configuration files in: /etc/mysql. ... .
my. cnf configuration file. ... .
Log files. Log files are the best place to start troubleshooting any program. ... .
mysqld and mysqld_safe. ... .
mysqladmin. ... .
Backups. ... .
Database engine. ... .
Related articles..

What is the MySQL configuration file?

Most MySQL programs can read startup options from option files (sometimes called configuration files). Option files provide a convenient way to specify commonly used options so that they need not be entered on the command line each time you run a program.

Where is the MySQL config file in Windows?

Default file locations that MySQL Router searches for configuration files on Windows..
Default system-wide installation under C:\ProgramData\MySQL\MySQL Router : C:\ProgramData\MySQL\MySQL Router\mysqlrouter.conf..
In addition: C:\Users\ username \AppData\Roaming\mysqlrouter..

Where is my CNF file MySQL?

cnf is located in /etc/mysql/my. cnf .