# Overrides the mysql defaults in /etc/mysql/my.cnf
# Any changes here will require restarting docker-compose to take effect.
# NB: This file is only used by docker-compose, and must be kept in sync with
# the RDS parameter group used by stage/prod:
# https://github.com/mozilla-platform-ops/devservices-aws/blob/master/treeherder/rds.tf

[mysqld]
character_set_server="utf8"
collation_server="utf8_bin"

# Ensure operations involving astral characters fail loudly,
# rather than mysql silently replacing each each byte of the
# original character with a U+FFFD replacement character.
# See bug 1275425.
sql_mode="NO_ENGINE_SUBSTITUTION,STRICT_ALL_TABLES"

# Django advises using READ-COMMITTED instead of REPEATABLE-READ:
# https://docs.djangoproject.com/en/1.10/ref/models/querysets/#get-or-create
# Unhelpfully MySQL uses a different (undocumented) variable name if set via config file:
# https://bugs.mysql.com/bug.php?id=70008
transaction-isolation=READ-COMMITTED

# Development/CI only: Speed up I/O by reducing data-loss protection.
innodb_flush_log_at_trx_commit="0"

# Development/CI only: Reduce verbosity of log output (output errors only).
log_error_verbosity="1"