Re: add checkpoint stats of snapshot and mapping files of pg_logical dir

On Mon, Mar 21, 2022 at 11:27:15AM +0530, Bharath Rupireddy wrote:
> On Sat, Mar 19, 2022 at 3:16 AM Nathan Bossart <nathandbossart@gmail.com> wrote:
>>         /* buffer stats */
>>         appendStringInfo(&logmsg, "wrote %d buffers (%.1f%%); ",
>>                                                           CheckpointStats.ckpt_bufs_written,
>>                                                           (double) CheckpointStats.ckpt_bufs_written * 100 /
NBuffers);
>>
>>         /* WAL file stats */
>>         appendStringInfo(&logmsg, "%d WAL file(s) added, %d removed, %d recycled; ",
>>                                                           CheckpointStats.ckpt_segs_added,
>>                                                           CheckpointStats.ckpt_segs_removed,
>>                                                           CheckpointStats.ckpt_segs_recycled);
> 
> Do we actually need to granularize the message like this? I actually
> don't think so, because we print the stats even if they are 0 (buffers
> written is 0 or WAL segments added is 0 and so on).

I suggested it because I thought it would improve readability and simplify
optionally adding new stats to the message.  If there is another way to
accomplish those things, that is fine by me.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com