- name: bgwriter
  type: group
  description: >
    Statistics about the background writer process's activity. Collected using the
    pg_stat_bgwriter query.
  release: ga
  fields:
    - name: checkpoints.scheduled
      type: long
      description: >
        Number of scheduled checkpoints that have been performed.
    - name: checkpoints.requested
      type: long
      description: >
        Number of requested checkpoints that have been performed.
    - name: checkpoints.times.write.ms
      type: float
      description: >
        Total amount of time that has been spent in the portion of checkpoint
        processing where files are written to disk, in milliseconds.
    - name: checkpoints.times.sync.ms
      type: float
      description: >
        Total amount of time that has been spent in the portion of checkpoint
        processing where files are synchronized to disk, in milliseconds.
    - name: buffers.checkpoints
      type: long
      description: >
        Number of buffers written during checkpoints.
    - name: buffers.clean
      type: long
      description: >
        Number of buffers written by the background writer.
    - name: buffers.clean_full
      type: long
      description: >
        Number of times the background writer stopped a cleaning scan because it
        had written too many buffers.
    - name: buffers.backend
      type: long
      description: >
        Number of buffers written directly by a backend.
    - name: buffers.backend_fsync
      type: long
      description: >
        Number of times a backend had to execute its own fsync call (normally
        the background writer handles those even when the backend does its own
        write)
    - name: buffers.allocated
      type: long
      description: >
        Number of buffers allocated.
    - name: stats_reset
      type: date
      description: >
        Time at which these statistics were last reset.