| `minio_notify_current_send_in_progress`        | Number of concurrent async Send calls active to all targets (deprecated, please use `minio_notify_target_current_send_in_progress` instead) |
| `minio_notify_events_errors_total`             | Events that were failed to be sent to the targets (deprecated, please use `minio_notify_target_failed_events` instead)                      |