root@db2093.codfw.wmnet[heartbeat]> SELECT ts FROM heartbeat.heartbeat ORDER BY ts DESC LIMIT 1; +----------------------------+ | ts | +----------------------------+ | 2020-11-20T10:31:30.000710 | +----------------------------+ 1 row in set (0.034 sec) root@db2093.codfw.wmnet[heartbeat]> describe heartbeat; +-----------------------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------------------+---------------------+------+-----+---------+-------+ | ts | varbinary(26) | NO | | NULL | | | server_id | int(10) unsigned | NO | PRI | NULL | | | file | varbinary(255) | YES | | NULL | | | position | bigint(20) unsigned | YES | | NULL | | | relay_master_log_file | varbinary(255) | YES | | NULL | | | exec_master_log_pos | bigint(20) unsigned | YES | | NULL | | | shard | varbinary(30) | YES | | NULL | | | datacenter | binary(5) | YES | | NULL | | +-----------------------+---------------------+------+-----+---------+-------+ 8 rows in set (0.035 sec)