1 files changed, 7 insertions, 0 deletions
diff --git a/README b/README
index 686141312..5cbc8e88e 100644
--- a/README
+++ b/README
@@ -546,6 +546,13 @@
                     Enable read-only SHA-384 and SHA-512 digest
                     support.
 
+     --enable-key-cache=SIZE
+                    Set the internal key and UID cache size.  This has
+                    a significant impact on performance with large
+                    keyrings.  The default is 4096, but for use on
+                    platforms where memory is an issue, it can be set
+                    as low as 5.
+
 
     Installation Problems
     ---------------------