SAFE_BACKLOG      277 modules/pm/pm_serials.c        max_serial=PM_get_current_serial(db_connection) - SAFE_BACKLOG;
SAFE_BACKLOG      359 modules/pm/protocol_mirror.c   current_serial=PM_get_current_serial(sql_connection) - SAFE_BACKLOG;
SAFE_BACKLOG      440 modules/pm/protocol_mirror.c 	while(((nrtm_q.last = PM_get_current_serial(sql_connection) - SAFE_BACKLOG)<current_serial)