diff --git a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/BlockFactory.java b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/BlockFactory.java
index 2266f02e2716d..53cb0a72f86fc 100644
--- a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/BlockFactory.java
+++ b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/BlockFactory.java
@@ -19,10 +19,10 @@
 
 public class BlockFactory {
     public static final String LOCAL_BREAKER_OVER_RESERVED_SIZE_SETTING = "esql.block_factory.local_breaker.over_reserved";
-    public static final ByteSizeValue LOCAL_BREAKER_OVER_RESERVED_DEFAULT_SIZE = ByteSizeValue.ofKb(4);
+    public static final ByteSizeValue LOCAL_BREAKER_OVER_RESERVED_DEFAULT_SIZE = ByteSizeValue.ofKb(8);
 
     public static final String LOCAL_BREAKER_OVER_RESERVED_MAX_SIZE_SETTING = "esql.block_factory.local_breaker.max_over_reserved";
-    public static final ByteSizeValue LOCAL_BREAKER_OVER_RESERVED_DEFAULT_MAX_SIZE = ByteSizeValue.ofKb(16);
+    public static final ByteSizeValue LOCAL_BREAKER_OVER_RESERVED_DEFAULT_MAX_SIZE = ByteSizeValue.ofKb(512);
 
     public static final String MAX_BLOCK_PRIMITIVE_ARRAY_SIZE_SETTING = "esql.block_factory.max_block_primitive_array_size";
     public static final ByteSizeValue DEFAULT_MAX_BLOCK_PRIMITIVE_ARRAY_SIZE = ByteSizeValue.ofKb(512);