diff --git a/src/gpu/vk/GrVkAMDMemoryAllocator.cpp b/src/gpu/vk/GrVkAMDMemoryAllocator.cpp
index ebecbad..4ee457f 100644
--- a/src/gpu/vk/GrVkAMDMemoryAllocator.cpp
+++ b/src/gpu/vk/GrVkAMDMemoryAllocator.cpp
@@ -46,7 +46,7 @@
     // Manually testing runs of dm using 64 here instead of the default 256 shows less memory usage
     // on average. Also dm seems to run faster using 64 so it doesn't seem to be trading off speed
     // for memory.
-    info.preferredLargeHeapBlockSize = 64*1024*1024;
+    info.preferredLargeHeapBlockSize = 4*1024*1024;
     info.pAllocationCallbacks = nullptr;
     info.pDeviceMemoryCallbacks = nullptr;
     info.frameInUseCount = 0;
diff --git a/src/gpu/vk/GrVkMemory.cpp b/src/gpu/vk/GrVkMemory.cpp
index 546e8d7..ea6e97c 100644
--- a/src/gpu/vk/GrVkMemory.cpp
+++ b/src/gpu/vk/GrVkMemory.cpp
@@ -84,7 +84,7 @@
     }
 }
 
-const VkDeviceSize kMaxSmallImageSize = 16 * 1024;
+const VkDeviceSize kMaxSmallImageSize = 256 * 1024;
 
 bool GrVkMemory::AllocAndBindImageMemory(const GrVkGpu* gpu,
                                          VkImage image,