postgresql_bgwriter_buffers_allocated_total

postgresql_bgwriter_buffers_backend_fsync_total

postgresql_bgwriter_buffers_backend_total

postgresql_bgwriter_buffers_checkpoint_total

postgresql_bgwriter_buffers_clean_total

postgresql_bgwriter_checkpoint_sync_time_milliseconds_total

postgresql_bgwriter_checkpoint_write_time_milliseconds_total

postgresql_bgwriter_checkpoints_requested_total

postgresql_bgwriter_checkpoints_timed_total

postgresql_bgwriter_maxwritten_clean_total

postgresql_bgwriter_stats_reset_unixtime