Re: Introduce a new view for checkpointer related stats

On Thu, Dec 1, 2022 at 9:50 PM Bharath Rupireddy <
bharath(dot)rupireddyforpostgres(at)gmail(dot)com> wrote:

> On Wed, Nov 30, 2022 at 5:15 PM Bharath Rupireddy
> <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> wrote:
> >
> > I don't have a strong opinion about changing column names. However, if
> > we were to change it, I prefer to use names that
> > PgStat_CheckpointerStats has. BTW, that's what
> > PgStat_BgWriterStats/pg_stat_bgwriter and
> > PgStat_ArchiverStats/pg_stat_archiver uses.
>
> After thinking about this a while, I convinced myself to change the
> column names to be a bit more meaningful. I still think having
> checkpoints in the column names is needed because it also has other
> backend related columns. I'm attaching the v4 patch for further
> review.
> CREATE VIEW pg_stat_checkpointer AS
> SELECT
> pg_stat_get_timed_checkpoints() AS timed_checkpoints,
> pg_stat_get_requested_checkpoints() AS requested_checkpoints,
> pg_stat_get_checkpoint_write_time() AS checkpoint_write_time,
> pg_stat_get_checkpoint_sync_time() AS checkpoint_sync_time,
> pg_stat_get_buf_written_checkpoints() AS
> buffers_written_checkpoints,
> pg_stat_get_buf_written_backend() AS buffers_written_backend,
> pg_stat_get_buf_fsync_backend() AS buffers_fsync_backend,
> pg_stat_get_checkpointer_stat_reset_time() AS stats_reset;
>

IMO, “buffers_written_checkpoints” is confusing. What do you think?

> --
> Bharath Rupireddy
> PostgreSQL Contributors Team
> RDS Open Source Databases
> Amazon Web Services: https://aws.amazon.com
>