Buildbot requires a connection to a database to maintain certain state
information, such as tracking pending build requests. By default this is
stored in a sqlite file called 'state.sqlite' in the base directory of your
master. This can be overridden with the
This parameter is of the form:
For sqlite databases, since there is no host and port, relative paths are
sqlite:/// and absolute paths with
c['db_url'] = "sqlite:///state.sqlite" c['db_url'] = "mysql://user:email@example.com/database_name?max_idle=300"
max_idle argument for MySQL connections should be set to something
less than the wait_timeout configured for your server. This ensures that
connections are closed and re-opened after the configured amount of idle time.
If you see errors such as
'MySQL server has gone away'), this means your
max_idle setting is
probably too high.
show global variables like 'wait_timeout'; will show
what the currently configured wait_timeout is on your MySQL server.