SQL database¶
Most OpenStack services use an SQL database to store information. The database typically runs on the controller node. The procedures in this guide use MariaDB or MySQL depending on the distribution. OpenStack services also support other SQL databases including PostgreSQL.
Note
If you see Too many connections or Too many open files
error log messages on OpenStack services, verify that maximum number of
connection settings are well applied to your environment.
In MariaDB, you may also need to change
open_files_limit
configuration.
