|From:||Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>|
|Subject:||show "aggressive" or not in autovacuum logs|
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Hello, it would be too late but I'd like to propose this because
this cannot be back-patched.
In autovacuum logs, "%u skipped frozen" shows the number of pages
skipped by ALL_FROZEN only in aggressive vacuum.
So users cannot tell whether '0 skipped-frozen' means a
non-agressive vacuum or no frozen-pages in an agressive vacuum.
I think it is nice to have an indication whether the scan was
"agressive" or not in log output. Like this,
> LOG: automatic aggressive vacuum of table "template1.pg_catalog.pg_statistic": index scans: 0
"0 skipped frozen" is uesless in non-aggressive vacuum but
removing it would be too-much. Inserting "aggressive" reduces
machine-readability so it might be better in another place. The
attached patch does the following.
> LOG: automatic vacuum of table "postgres.public.pgbench_branches": mode: normal, index scans: 0
> LOG: automatic vacuum of table "postgres.public.pgbench_branches": mode: aggressive, index scans: 0
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