BUG #11678: database age

The following bug has been logged on the website:

Bug reference: 11678
Logged by: sunxin
Email address: sunxin(at)leyou(dot)com
PostgreSQL version: 9.1.4
Operating system: debian6
Description:

/*
* Do not truncate CLOG if we seem to have suffered wraparound already;
* the computed minimum XID might be bogus. This case should now be
* impossible due to the defenses in GetNewTransactionId, but we keep the
* test anyway.
*/

追心 2014/10/13 9:05:25
relname |
relnamespace | age | relfrozenxid
-----------------------------------------------------------------+--------------+-------------+--------------
pg_authid |
11 | -1916545230 | 2036829257
sl_log_2 |
1348563995 | 59520 | 120224507
sl_log_1 |
4286920530 | 59520 | 120224507
sl_log_1 |
4202585842 | 59520 | 120224507

datname | age | datfrozenxid | available_xids
------------+-------------+--------------+----------------
postgres | 1074730916 | 3340497609 | 1071752732
testdb | -1916568028 | 2036829257 | 4063051676