Configuring the MySQL Server

From AgileApps Support Wiki

These instructions apply to the version of MySQL specified in the Software Requirements.

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Note: MySQL configuration is a pre-requisite for the AgileApps installation.

Terminology:

MySQL Server
The database server which has MySQL Server software installed, configured, and running.
MySQL Client
Any other computer which connects to the database server and has the MySQL Client software installed, configured, and running.
  • The client connects to the database server to access data, for example, webserver.
Configuration file
my.cnf, a MySQL configuration file that may be edited and used in the MySQL client or MySQL Server installation.
MySQL Settings
Storage Engine
default-storage-engine = innodb
Server System Variables Configuration
It is observed that READ_UNCOMMITTED does not work well with Row-Based Replication. Use one of the following configurations:
a) Either STATEMENT-BASED or MIXED replication with the Transaction Isolation level dictated by business needs.
b) ROW-BASED replication with transaction_isolation = READ-COMMITTED
User Configuration
  • Create a user account with password in MySQL
    The Application Server will use the user details.
  • The user account should have all MySQL privileges enabled on all databases
  • Use the default root account that is created during the installation of MySQL. You can also create a non-root MySQL user to run Agile Apps. For more information, see Creating a non-root MySQL User to Run Agile Apps.
sql-mode Configuration
  • Add the following code to the my.cnf file located in the MySQL Client:
sql-mode="PIPES_AS_CONCAT,ANSI_QUOTES"
  • Add the following code to the my.cnf file located in the MySQL Server:
sql-mode="PIPES_AS_CONCAT,ANSI_QUOTES"
MySQL Configuration for UTF-8 Unicode character set for 5.7 Version
  • Add the following code to the my.cnf file, located in the MySQL Client:
default-character-set=utf8
  • Add the following code to the my.cnf file, located in MySQL Server:
character-set-server=utf8
collation-server=utf8_general_ci
The character set defines how records can be alphanumerically ordered (or grouped, sorted, filtered, indexed). The list of supported languages is determined by the character set available at the server level. Hence, the UTF-8 Unicode character set configuration is required as part of MySQL configuration.
To specify character settings at MySQL configuration time:
For MySQL Version 5.7, see https://dev.mysql.com/doc/refman/5.7/en/charset-applications.html
MySQL Configuration for UTF-8mb4 Unicode character set for MySQL 8.0 Version

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Note: For MySQL configuration v5.7 to v8 upgrade, refer Upgrading to MySQL v8.

  • Add the following code to the my.cnf file, located in the MySQL Client:
default-character-set=utf8mb4
  • Add the following code to the my.cnf file, located in MySQL Server:
character-set-server=utf8mb4
collation-server=utf8mb4_0900_ai_ci
The character set defines how records can be alphanumerically ordered (or grouped, sorted, filtered, indexed). The list of supported languages is determined by the character set available at the server level. Hence, the UTF-8 Unicode character set configuration is required as part of MySQL configuration.

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Note: If user does not specific in my.cnf or my.ini file then default MySQL 8 character set and collation are utf8mb4 and utf8mb4_0900_ai_ci taken by server.

To specify character settings at MySQL configuration time:
For MySQL Version 8.0, see http://dev.mysql.com/doc/refman//8.0/en/charset-applications.html
max_allowed_packet Configuration
  • Add max_allowed_packet = 64M to my.cnf or my.ini
For MySQL Version 5.7, see https://dev.mysql.com/doc/refman/5.7/en/charset-applications.html
For MySQL Version 8.0, see https://dev.mysql.com/doc/refman/8.0/en/charset-applications.html
  • Restart the MySQL server to implement the changes
regexp_time_limit Configuration

The regular expression limit is expressed as the maximum permitted number of steps performed by the match engine, and thus affects execution time only indirectly. It is defined in milliseconds.

  • Add regexp_time_limit=1024 to my.cnf or my.ini
For MySQL Version 5.7, see https://dev.mysql.com/doc/refman/5.7/en/charset-applications.html
For MySQL Version 8.0, see https://dev.mysql.com/doc/refman/8.0/en/charset-applications.html
  • Restart the MySQL server to implement the changes
Populate the Timezone Tables
The platform uses MySQL's timezone tables for timezone conversions. These tables are not automatically populated when MySQL is installed, so it necessary to do so after installation.
Run the following program to initialize the MySQL timezone tables:
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql
where /usr/share/zoneinfo is the standard Linux location for the time zone files. (Your system may differ.)
For MySQL Version 5.7, see https://dev.mysql.com/doc/refman/5.7/en/mysql-tzinfo-to-sql.html
For MySQL Version 8.0, see https://dev.mysql.com/doc/refman/8.0/en/mysql-tzinfo-to-sql.html


Configuring MySQL Version 5.7 root password

  1. Start the mysql service using the command: service mysqld start
  2. Execute mysql_secure_installation script
    A prompt appears to input the root password.
    Info: To get temporary root password for MySQL Version 5.7 Community edition, see /root/.mysql_secret file.
    For Commercial installation temporary password will be generated at at /var/log/mysqld.log.
    Note: MySQL user password should contain at least one special character.