diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 47733116193..2b53945bc84 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -390,7 +390,7 @@ typedef struct _zend_mm_free_block {
 #define ZEND_MM_NUM_BUCKETS (sizeof(size_t) << 3)
 
 #define ZEND_MM_CACHE 1
-#define ZEND_MM_CACHE_SIZE (ZEND_MM_NUM_BUCKETS * 2 * 1024)
+#define ZEND_MM_CACHE_SIZE (ZEND_MM_NUM_BUCKETS * 4 * 1024)
 
 #ifndef ZEND_MM_CACHE_STAT
 # define ZEND_MM_CACHE_STAT 0