Gregory Stark <stark(at)enterprisedb(dot)com> writes:
> When we checkpoint we write out all dirty buffers. But ISTM we don't really
> need to write out buffers which are dirty but which have an LSN older than the
> previous checkpoint. Those represent buffers which were dirtied by a
> non-wal-logged modification, ie, hint bit setting. The other non-wal-logged
> operations will sync the buffer themselves when they're done.
In the current dispensation we don't really care how long a checkpoint
takes, so I don't see the advantage to be gained.
regards, tom lane