diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtutils.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtutils.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c index 84b391ce038..1429ac8b63e 100644 --- a/src/backend/access/nbtree/nbtutils.c +++ b/src/backend/access/nbtree/nbtutils.c @@ -1854,7 +1854,15 @@ _bt_killitems(IndexScanDesc scan) else if (ItemPointerEquals(&ituple->t_tid, &kitem->heapTid)) killtuple = true; - if (killtuple) + /* + * Mark index item as dead, if it isn't already. Since this + * happens while holding a buffer lock possibly in shared mode, + * it's possible that multiple processes attempt to do this + * simultaneously, leading to multiple full-page images being + * set to WAL (if wal_log_hints or data checksums are enabled), + * which is undesirable. + */ + if (killtuple && !ItemIdIsDead(iid)) { /* found the item/all posting list items */ ItemIdMarkDead(iid); |