Rewrite comment for slightly greater accuracy.

Per an observation from Thom Brown that the old version contained a typo.

diff --git a/src/backend/commands/vacuumlazy.c b/src/backend/commands/vacuumlazy.c
index bbf8b8d084d9d51b715a4553b88359aa4973db99..38deddc47c0d0c9bd8c3e17b7f39ac51d62dec7f 100644 (file)
--- a/src/backend/commands/vacuumlazy.c
+++ b/src/backend/commands/vacuumlazy.c
@@ -488,8 +488,9 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
                if (!ConditionalLockBufferForCleanup(buf))
                {
                        /*
-                        * It's OK to skip vacuuming a page, as long as its not got data
-                        * that needs to be cleaned for wraparound avoidance.
+                        * If we're not scanning the whole relation to guard against XID
+                        * wraparound, it's OK to skip vacuuming a page.  The next vacuum
+                        * will clean it up.
                         */
                        if (!scan_all)
                        {