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Diffstat (limited to 'src/backend/access/nbtree/nbtxlog.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtxlog.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/backend/access/nbtree/nbtxlog.c b/src/backend/access/nbtree/nbtxlog.c index 3b351a8b964..deca38c57c2 100644 --- a/src/backend/access/nbtree/nbtxlog.c +++ b/src/backend/access/nbtree/nbtxlog.c @@ -968,7 +968,11 @@ btree_redo(XLogRecPtr lsn, XLogRecord *record) /* * Btree reuse page records exist to provide a conflict point * when we reuse pages in the index via the FSM. That's all it - * does though. + * does though. latestRemovedXid was the page's btpo.xact. The + * btpo.xact < RecentGlobalXmin test in _bt_page_recyclable() + * conceptually mirrors the pgxact->xmin > limitXmin test in + * GetConflictingVirtualXIDs(). Consequently, one XID value + * achieves the same exclusion effect on master and standby. */ { xl_btree_reuse_page *xlrec = (xl_btree_reuse_page *) XLogRecGetData(record); |