diff options
Diffstat (limited to 'src/backend/access/table/tableam.c')
| -rw-r--r-- | src/backend/access/table/tableam.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/access/table/tableam.c b/src/backend/access/table/tableam.c index 771438c8cec..c6bdb7e1c68 100644 --- a/src/backend/access/table/tableam.c +++ b/src/backend/access/table/tableam.c @@ -737,11 +737,19 @@ table_block_relation_estimate_size(Relation rel, int32 *attr_widths, * and (c) different table AMs might use different padding schemes. */ int32 tuple_width; + int fillfactor; + + /* + * Without reltuples/relpages, we also need to consider fillfactor. + * The other branch considers it implicitly by calculating density + * from actual relpages/reltuples statistics. + */ + fillfactor = RelationGetFillFactor(rel, HEAP_DEFAULT_FILLFACTOR); tuple_width = get_rel_data_width(rel, attr_widths); tuple_width += overhead_bytes_per_tuple; /* note: integer division is intentional here */ - density = usable_bytes_per_page / tuple_width; + density = (usable_bytes_per_page * fillfactor / 100) / tuple_width; } *tuples = rint(density * (double) curpages); |