diff --git sites/all/modules/memcache/memcache.inc sites/all/modules/memcache/memcache.inc
index de14584..3898442 100644
--- sites/all/modules/memcache/memcache.inc
+++ sites/all/modules/memcache/memcache.inc
@@ -188,7 +188,10 @@ function cache_clear_all($cid = NULL, $table = NULL, $wildcard = FALSE) {
     elseif ($cid == '*') {
       $cid = '';
     }
-    if (variable_get('cache_lifetime', 0) && empty($cid)) {
+    // TODO - Took out variable_get('cache_lifetime', 0) from the if condition.
+    // Why should '' be treated as a wildcard flush instead of a cache_flush_table
+    // even when variable_get('cache_lifetime', 0) is set as 0
+    if (empty($cid)) {
       // Update the timestamp of the last global flushing of this table.  When
       // retrieving data from this table, we will compare the cache creation
       // time minus the cache_flush time to the cache_lifetime to determine