diff --git a/src/backend/utils/hash/dynahash.c b/src/backend/utils/hash/dynahash.c
index eacffc4..48def5e 100644
--- a/src/backend/utils/hash/dynahash.c
+++ b/src/backend/utils/hash/dynahash.c
@@ -544,19 +544,19 @@ choose_nelem_alloc(Size entrysize)
 	elementSize = MAXALIGN(sizeof(HASHELEMENT)) + MAXALIGN(entrysize);
 
 	/*
-	 * The idea here is to choose nelem_alloc at least 32, but round up so
+	 * The idea here is to choose nelem_alloc at least 64, but round up so
 	 * that the allocation request will be a power of 2 or just less. This
 	 * makes little difference for hash tables in shared memory, but for hash
 	 * tables managed by palloc, the allocation request will be rounded up to
 	 * a power of 2 anyway.  If we fail to take this into account, we'll waste
 	 * as much as half the allocated space.
 	 */
-	allocSize = 32 * 4;			/* assume elementSize at least 8 */
+	allocSize = 64 * 4;			/* assume elementSize at least 8 */
 	do
 	{
 		allocSize <<= 1;
 		nelem_alloc = allocSize / elementSize;
-	} while (nelem_alloc < 32);
+	} while (nelem_alloc < 64);
 
 	return nelem_alloc;
 }