diff --git a/hudi-client/src/main/java/org/apache/hudi/config/HoodieMemoryConfig.java b/hudi-client/src/main/java/org/apache/hudi/config/HoodieMemoryConfig.java
index 88f07b91c2577..be6b96eddfb84 100644
--- a/hudi-client/src/main/java/org/apache/hudi/config/HoodieMemoryConfig.java
+++ b/hudi-client/src/main/java/org/apache/hudi/config/HoodieMemoryConfig.java
@@ -40,8 +40,10 @@ public class HoodieMemoryConfig extends DefaultHoodieConfig {
   public static final String MAX_MEMORY_FRACTION_FOR_COMPACTION_PROP = "hoodie.memory.compaction.fraction";
   // Default max memory fraction during compaction, excess spills to disk
   public static final String DEFAULT_MAX_MEMORY_FRACTION_FOR_COMPACTION = String.valueOf(0.6);
-  // Default memory size per compaction (used if SparkEnv is absent), excess spills to disk
-  public static final long DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 1024 * 1024 * 1024L; // 1GB
+  // Default memory size (1GB) per compaction (used if SparkEnv is absent), excess spills to disk
+  public static final long DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 1024 * 1024 * 1024L;
+  // Minimum memory size (100MB) for the spillable map.
+  public static final long DEFAULT_MIN_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES = 100 * 1024 * 1024L;
   // Property to set the max memory for merge
   public static final String MAX_MEMORY_FOR_MERGE_PROP = "hoodie.memory.merge.max.size";
   // Property to set the max memory for compaction
@@ -91,6 +93,12 @@ public Builder withMaxMemoryFractionPerPartitionMerge(double maxMemoryFractionPe
       return this;
     }
 
+    public Builder withMaxMemoryMaxSize(long mergeMaxSize, long compactionMaxSize) {
+      props.setProperty(MAX_MEMORY_FOR_MERGE_PROP, String.valueOf(mergeMaxSize));
+      props.setProperty(MAX_MEMORY_FOR_COMPACTION_PROP, String.valueOf(compactionMaxSize));
+      return this;
+    }
+
     public Builder withMaxMemoryFractionPerCompaction(double maxMemoryFractionPerCompaction) {
       props.setProperty(MAX_MEMORY_FRACTION_FOR_COMPACTION_PROP, String.valueOf(maxMemoryFractionPerCompaction));
       return this;
@@ -136,7 +144,7 @@ private long getMaxMemoryAllowedForMerge(String maxMemoryFraction) {
         double maxMemoryFractionForMerge = Double.valueOf(maxMemoryFraction);
         double userAvailableMemory = executorMemoryInBytes * (1 - memoryFraction);
         long maxMemoryForMerge = (long) Math.floor(userAvailableMemory * maxMemoryFractionForMerge);
-        return maxMemoryForMerge;
+        return Math.max(DEFAULT_MIN_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES, maxMemoryForMerge);
       } else {
         return DEFAULT_MAX_MEMORY_FOR_SPILLABLE_MAP_IN_BYTES;
       }
diff --git a/hudi-client/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java b/hudi-client/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java
index 4826c89d60928..095dbd5d73fa4 100644
--- a/hudi-client/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java
+++ b/hudi-client/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java
@@ -193,9 +193,11 @@ private void init(String fileId, String partitionPath, HoodieDataFile dataFileTo
   private String init(String fileId, Iterator<HoodieRecord<T>> newRecordsItr) {
     try {
       // Load the new records in a map
-      logger.info("MaxMemoryPerPartitionMerge => " + config.getMaxMemoryPerPartitionMerge());
-      this.keyToNewRecords = new ExternalSpillableMap<>(config.getMaxMemoryPerPartitionMerge(),
-          config.getSpillableMapBasePath(), new DefaultSizeEstimator(), new HoodieRecordSizeEstimator(originalSchema));
+      long memoryForMerge = config.getMaxMemoryPerPartitionMerge();
+      logger.info("MaxMemoryPerPartitionMerge => " + memoryForMerge);
+      this.keyToNewRecords = new ExternalSpillableMap<>(memoryForMerge,
+          config.getSpillableMapBasePath(), new DefaultSizeEstimator(),
+          new HoodieRecordSizeEstimator(originalSchema));
     } catch (IOException io) {
       throw new HoodieIOException("Cannot instantiate an ExternalSpillableMap", io);
     }