diff --git a/src/DurableTask.Netherite/StorageLayer/Faster/AzureBlobs/BlobManager.cs b/src/DurableTask.Netherite/StorageLayer/Faster/AzureBlobs/BlobManager.cs
index da3a84b0..2937b009 100644
--- a/src/DurableTask.Netherite/StorageLayer/Faster/AzureBlobs/BlobManager.cs
+++ b/src/DurableTask.Netherite/StorageLayer/Faster/AzureBlobs/BlobManager.cs
@@ -144,7 +144,7 @@ public static (int pageSizeBits, int segmentSizeBits, int memorySizeBits) GetImm
         {
             int pageSizeBits =    tuningParameters?.StoreLogPageSizeBits    ?? 10; // 1kB
             int segmentSizeBits = tuningParameters?.StoreLogSegmentSizeBits ?? 19; // 512 kB
-            int memorySizeBits = 29; // 512 MB - that is just the max, not what we actually use
+            int memorySizeBits = tuningParameters?.StoreLogMemorySizeBits ?? 29; // 512 MB - that is just the max, not what we actually use
 
             return (pageSizeBits, segmentSizeBits, memorySizeBits);
         }