Add CHANGES note for [GL #4591]

diff --git a/CHANGES b/CHANGES
index d7500fecc35b44f5040d153612ddd79ea45e82c8..b6657661e68fe907eea75c9a9f82436b1e5d1061 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+6353.  [bug]           Improve the TTL-based cleaning by removing the expired
+                       headers from the heap, so they don't block the next
+                       cleaning round and clean more than a single item for
+                       each new addition to the RBTDB. [GL #4591]
+
 6352.  [bug]           Revert change 6319 and decrease lock contention during
                        RBTDB tree pruning by not cleaning up nodes recursively
                        within a single prune_tree() call. [GL #4596]