Open anhnongdan opened 6 years ago
For PW1 VTV with heaviest traffic of all.
Run start 13:00
=> Web UI 504 - then 404 => DB No request imported to tracker. => Log scanning runs very slow.
Resources are all OK
Backup: 13:00 ~ 2017-10-06 13:46:37: backup success for 1 After backing up, pw1 comes backon.
1. Between 13:20 and 13:40: xtrabackup run binary log scanning
Fri Oct 6 13:18:02 ICT 2017 Total wait time is high 7123 - avg. 100
13356362 admin localhost:35966 NULL Query 116 Waiting for table flush FLUSH NO_WRITE_TO_BINLOG TABLES 0.000
13370790 admin localhost:55594 pw1 Query 115 Waiting for table flush SELECT visit_last_action_time, visit_first_action_time, idvisitor, idvisit, user_id, visit_exit_idac 0.000
Fri Oct 6 13:40:02 ICT 2017 Total wait time is high 106035 - avg. 1413 13356362 admin localhost:35966 NULL Query 1436 Waiting for table flush FLUSH NO_WRITE_TO_BINLOG TABLES 0.000 13370790 admin localhost:55594 pw1 Query 1435 Waiting for table flush SELECT visit_last_action_time, visit_first_action_time, idvisitor, idvisit, user_id, visit_exit_idac 0.000
That can be the clue.
??? Do I need to stop the DB first ???
Verified on low traffic instance: THVL and K+: WebUI works while backup is running.
Continue #9 System is running in a stable state without backup.