Respect Hot Standby controls while recycling btree index pages.

[pg-rex/syncrep.git] / src / backend / access / nbtree / nbtpage.c

diff --git a/src/backend/access/nbtree/nbtpage.c b/src/backend/access/nbtree/nbtpage.c
index 58f47e7..65354e6 100644 (file)
--- a/src/backend/access/nbtree/nbtpage.c
+++ b/src/backend/access/nbtree/nbtpage.c
@@ -677,6 +677,7 @@ bool
 _bt_page_recyclable(Page page)
 {
        BTPageOpaque opaque;
+       TransactionId cutoff;
 
        /*
         * It's possible to find an all-zeroes page in an index --- for example, a
@@ -689,11 +690,18 @@ _bt_page_recyclable(Page page)
 
        /*
         * Otherwise, recycle if deleted and too old to have any processes
-        * interested in it.
+        * interested in it.  If we are generating records for Hot Standby
+        * defer page recycling until RecentGlobalXmin to respect user
+        * controls specified by vacuum_defer_cleanup_age or hot_standby_feedback.
         */
+       if (XLogStandbyInfoActive())
+               cutoff = RecentGlobalXmin;
+       else
+               cutoff = RecentXmin;
+
        opaque = (BTPageOpaque) PageGetSpecialPointer(page);
        if (P_ISDELETED(opaque) &&
-               TransactionIdPrecedesOrEquals(opaque->btpo.xact, RecentXmin))
+               TransactionIdPrecedesOrEquals(opaque->btpo.xact, cutoff))
                return true;
        return false;
 }