| Field | Internal name | Type | Warn | Crit | |
|---|---|---|---|---|---|
| Checkpoints issued because of checkpoint_timeout | checkpoints_timed | derive | None | None | |
| Checkpoint issued by request | checkpoints_req | derive | None | None | |
| Buffers write when checkpoint occured | buffers_checkpoint | derive | None | None | |
| Buffers write for cleaning | buffers_clean | derive | None | None | |
| Times cleaning scan is stopped because exceed bgwriter_lru_maxpages | maxwritten_clean | derive | None | None | |
| Number of buffers written by backends | buffers_backend | derive | None | None | |
| Total number of buffers allocated | buffers_alloc | derive | None | None | |