diff --git a/fe/fe-common/src/main/java/org/apache/doris/common/Config.java b/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
index d01a8ac09f5a33..02ff61ed5c6c13 100644
--- a/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
+++ b/fe/fe-common/src/main/java/org/apache/doris/common/Config.java
@@ -2833,12 +2833,12 @@ public class Config extends ConfigBase {
     public static int arrow_flight_max_connections = 4096;
 
     @ConfField(mutable = true, masterOnly = true, description = {
-        "Auto Buckets中按照partition size去估算bucket数，存算一体partition size 1G估算一个bucket，"
-            + "但存算分离下partition size 10G估算一个bucket。 若配置小于0，会在在代码中会自适应存算一体模式默认1G，在存算分离默认10G",
+        "Auto Buckets中按照partition size去估算bucket数，存算一体partition size 5G估算一个bucket，"
+            + "但存算分离下partition size 10G估算一个bucket。 若配置小于0，会在在代码中会自适应存算一体模式默认5G，在存算分离默认10G",
         "In Auto Buckets, the number of buckets is estimated based on the partition size. "
-            + "For storage and computing integration, a partition size of 1G is estimated as one bucket."
+            + "For storage and computing integration, a partition size of 5G is estimated as one bucket."
             + " but for cloud, a partition size of 10G is estimated as one bucket. "
-            + "If the configuration is less than 0, the code will have an adaptive non-cloud mode with a default of 1G,"
+            + "If the configuration is less than 0, the code will have an adaptive non-cloud mode with a default of 5G,"
             + " and in cloud mode with a default of 10G."
     })
     public static int autobucket_partition_size_per_bucket_gb = -1;
diff --git a/fe/fe-core/src/main/java/org/apache/doris/common/util/AutoBucketUtils.java b/fe/fe-core/src/main/java/org/apache/doris/common/util/AutoBucketUtils.java
index df74762b0877da..c6b8e69feaefc1 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/common/util/AutoBucketUtils.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/common/util/AutoBucketUtils.java
@@ -92,16 +92,17 @@ private static int convertPartitionSizeToBucketsNum(long partitionSize) {
         } else if (partitionSize <= SIZE_1GB) {
             return 2;
         } else {
-            if (Config.autobucket_partition_size_per_bucket_gb <= 0) {
+            int partitionSizePerBucket = Config.autobucket_partition_size_per_bucket_gb;
+            if (partitionSizePerBucket <= 0) {
                 if (Config.isCloudMode()) {
-                    Config.autobucket_partition_size_per_bucket_gb = 10;
+                    partitionSizePerBucket = 10;
                 } else {
-                    Config.autobucket_partition_size_per_bucket_gb = 1;
+                    partitionSizePerBucket = 5;
                 }
                 logger.debug("autobucket_partition_size_per_bucket_gb <= 0, use adaptive {}",
-                        Config.autobucket_partition_size_per_bucket_gb);
+                        partitionSizePerBucket);
             }
-            return  (int) ((partitionSize - 1) / (Config.autobucket_partition_size_per_bucket_gb * SIZE_1GB) + 1);
+            return  (int) ((partitionSize - 1) / (partitionSizePerBucket * SIZE_1GB) + 1);
         }
     }
 
diff --git a/fe/fe-core/src/test/java/org/apache/doris/catalog/DynamicPartitionTableTest.java b/fe/fe-core/src/test/java/org/apache/doris/catalog/DynamicPartitionTableTest.java
index 4217342133b9ab..9495c048f4b13f 100644
--- a/fe/fe-core/src/test/java/org/apache/doris/catalog/DynamicPartitionTableTest.java
+++ b/fe/fe-core/src/test/java/org/apache/doris/catalog/DynamicPartitionTableTest.java
@@ -1824,7 +1824,7 @@ public void testAutoBuckets() throws Exception {
         partitions = Lists.newArrayList(table.getAllPartitions());
         partitions.sort(Comparator.comparing(Partition::getId));
         Assert.assertEquals(54, partitions.size());
-        // 100GB total, 1GB per bucket, should 100 buckets.
-        Assert.assertEquals(100, partitions.get(partitions.size() - 1).getDistributionInfo().getBucketNum());
+        // 100GB total, 5GB per bucket, should 20 buckets.
+        Assert.assertEquals(20, partitions.get(partitions.size() - 1).getDistributionInfo().getBucketNum());
     }
 }