VACUUM VERBOSE: tweak scanned_pages logic.
commit6e20f4600a420961817ce743be454080745f84d1
authorPeter Geoghegan <pg@bowt.ie>
Sun, 13 Mar 2022 20:07:49 +0000 (13 13:07 -0700)
committerPeter Geoghegan <pg@bowt.ie>
Sun, 13 Mar 2022 20:07:49 +0000 (13 13:07 -0700)
tree038d6e3cedc5e5c282c97225580dad829f3b03a4
parent7e12256b478b89518ff410f29192af21de37d070
VACUUM VERBOSE: tweak scanned_pages logic.

Commit 872770fd6c taught VACUUM VERBOSE and autovacuum logging to
display the total number of pages scanned by VACUUM.  This information
was also displayed as a percentage of rel_pages in parenthesis, which
makes it easy to spot trends over time and across tables.

The instrumentation displayed "0 scanned (0.00% of total)" for totally
empty tables.  Tweak the instrumentation: have it show "0 scanned
(100.00% of total)" for empty tables instead.  This approach is clearer
and more consistent.
src/backend/access/heap/vacuumlazy.c