Alvaro Herrera <[EMAIL PROTECTED]> writes: > Hmm ... that would be strange. Off-the-cuff idea: we introduced code to > advance relfrozenxid in CLUSTER, TRUNCATE and table-rewriting forms of > ALTER TABLE. Perhaps the problem is that we're neglecting to update it > for the toast table there. AFAIR I analyzed the cases and they were all > handled, but perhaps I forgot something.
I found a smoking gun ... regression=# create table foo (f1 serial primary key, f2 text); NOTICE: CREATE TABLE will create implicit sequence "foo_f1_seq" for serial column "foo.f1" NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "foo_pkey" for table "foo" CREATE TABLE regression=# insert into foo values(1,repeat('xyzzy',100000)); INSERT 0 1 regression=# insert into foo values(2,repeat('xqzzy',100000)); INSERT 0 1 regression=# select relname, relkind, relfrozenxid from pg_class order by oid desc limit 6; relname | relkind | relfrozenxid -----------------------+---------+-------------- foo_pkey | i | 0 pg_toast_707220_index | i | 0 pg_toast_707220 | t | 119421 foo | r | 119421 foo_f1_seq | S | 0 xmlview5 | v | 0 (6 rows) regression=# cluster foo_pkey on foo; CLUSTER regression=# select relname, relkind, relfrozenxid from pg_class order by oid desc limit 6; relname | relkind | relfrozenxid -----------------------+---------+-------------- pg_toast_707231_index | i | 0 pg_toast_707231 | t | 119424 foo_pkey | i | 0 foo | r | 4195086720 foo_f1_seq | S | 0 xmlview5 | v | 0 (6 rows) So something is out of whack in CLUSTER. However it only seems to be broken in HEAD, so I'm not sure this helps to explain the original report. (Speculation: this is related to the rewrite to make CLUSTER MVCC-safe?) regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq