From 479818af02f4983b5abed2c5ba43fb86d9c3df0f Mon Sep 17 00:00:00 2001
From: Keith Bostic <keith@wiredtiger.com>
Date: Tue, 1 Dec 2015 18:29:20 -0500
Subject: [PATCH] WT-2553: If a leaf or internal page's read generation is set
 to WT_READGEN_OLDEST, prioritize it for eviction.

---
 src/evict/evict_lru.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/evict/evict_lru.c b/src/evict/evict_lru.c
index f2784890ab7..3d5a79de82d 100644
--- a/src/evict/evict_lru.c
+++ b/src/evict/evict_lru.c
@@ -36,6 +36,10 @@ __evict_read_gen(const WT_EVICT_ENTRY *entry)
 
 	page = entry->ref->page;
 
+	/* Any page set to the oldest generation should be discarded. */
+	if (page->read_gen == WT_READGEN_OLDEST)
+		return (WT_READGEN_OLDEST);
+
 	/* Any empty page (leaf or internal), is a good choice. */
 	if (__wt_page_is_empty(page))
 		return (WT_READGEN_OLDEST);