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Add back vacuum_cleanup_index_scale_factor parameter.

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Commit 9f3665fb removed the vacuum_cleanup_index_scale_factor storage
parameter.  However, that creates dump/reload hazards when moving across
major versions.

Add back the vacuum_cleanup_index_scale_factor parameter (though not the
GUC of the same name) purely to avoid problems when using tools like
pg_upgrade.  The parameter remains disabled and undocumented.

No backpatch to Postgres 13, since vacuum_cleanup_index_scale_factor was
only disabled by REL_13_STABLE's version of master branch commit
9f3665fb in the first place -- the parameter already looks like this on
REL_13_STABLE.

Discussion: https://postgr.es/m/YEm/a3Ko3nKnBuVq@paquier.xyz
This commit is contained in:
Peter Geoghegan
2021-03-11 12:42:46 -08:00
parent 32fd2b57d7
commit effdd3f3b6
3 changed files with 12 additions and 0 deletions
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2
src/backend/access/nbtree/nbtutils.c
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@ -2105,6 +2105,8 @@ btoptions(Datum reloptions, bool validate)
{
static const relopt_parse_elt tab[] = {
{"fillfactor", RELOPT_TYPE_INT, offsetof(BTOptions, fillfactor)},
{"vacuum_cleanup_index_scale_factor", RELOPT_TYPE_REAL,
offsetof(BTOptions, vacuum_cleanup_index_scale_factor)},
{"deduplicate_items", RELOPT_TYPE_BOOL,
offsetof(BTOptions, deduplicate_items)}