diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtutils.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtutils.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c index b5e7686303e..33c0ee00823 100644 --- a/src/backend/access/nbtree/nbtutils.c +++ b/src/backend/access/nbtree/nbtutils.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/nbtree/nbtutils.c,v 1.84 2007/04/06 22:33:42 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/access/nbtree/nbtutils.c,v 1.85 2007/04/09 22:04:01 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1263,11 +1263,13 @@ _bt_start_vacuum(Relation rel) LWLockAcquire(BtreeVacuumLock, LW_EXCLUSIVE); - /* Assign the next cycle ID, being careful to avoid zero */ - do - { - result = ++(btvacinfo->cycle_ctr); - } while (result == 0); + /* + * Assign the next cycle ID, being careful to avoid zero as well as + * the reserved high values. + */ + result = ++(btvacinfo->cycle_ctr); + if (result == 0 || result > MAX_BT_CYCLE_ID) + result = btvacinfo->cycle_ctr = 1; /* Let's just make sure there's no entry already for this index */ for (i = 0; i < btvacinfo->num_vacuums; i++) |