Description of configuration options for database

Configuration option = Default value	Description
[DEFAULT]
database_connection = None	(StrOpt) DEPRECATED - Database connection string.
mysql_engine = InnoDB	(StrOpt) MySQL engine to use.
sqlite_db = ceilometer.sqlite	(StrOpt) The file name to use with SQLite
sqlite_synchronous = True	(BoolOpt) If True, SQLite uses synchronous mode
[database]
backend = sqlalchemy	(StrOpt) The backend to use for db
connection = sqlite:////usr/lib/python/site-packages/ceilometer/openstack/common/db/$sqlite_db	(StrOpt) The SQLAlchemy connection string used to connect to the database
connection_debug = 0	(IntOpt) Verbosity of SQL debugging information. 0=None, 100=Everything
connection_trace = False	(BoolOpt) Add python stack traces to SQL as comment strings
idle_timeout = 3600	(IntOpt) Timeout before idle sql connections are reaped
max_overflow = None	(IntOpt) If set, use this value for max_overflow with sqlalchemy
max_pool_size = None	(IntOpt) Maximum number of SQL connections to keep open in a pool
max_retries = 10	(IntOpt) Maximum db connection retries during startup. (setting -1 implies an infinite retry count)
min_pool_size = 1	(IntOpt) Minimum number of SQL connections to keep open in a pool
pool_timeout = None	(IntOpt) If set, use this value for pool_timeout with sqlalchemy
retry_interval = 10	(IntOpt) Interval between retries of opening a sql connection
slave_connection =	(StrOpt) The SQLAlchemy connection string used to connect to the slave database
time_to_live = -1	(IntOpt) Number of seconds that samples are kept in the database for (<= 0 means forever).