diff --git a/charts/graphscope-store/values.yaml b/charts/graphscope-store/values.yaml
index 063a81baa478..00002c908384 100644
--- a/charts/graphscope-store/values.yaml
+++ b/charts/graphscope-store/values.yaml
@@ -504,9 +504,9 @@ engineType: "gaia"
 discoveryMode: "file"
 
 ## Ingestor Config
-ingestorQueueBufferSize: 128
+ingestorQueueBufferSize: 1024
 
-ingestorSenderBufferSize: 128
+ingestorSenderBufferSize: 1024
 
 ## Coordinator Config
 snapshotIncreaseIntervalMs: 1000
diff --git a/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/IngestorConfig.java b/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/IngestorConfig.java
index 9a8b0f52418e..238b5c1f9771 100644
--- a/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/IngestorConfig.java
+++ b/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/IngestorConfig.java
@@ -15,10 +15,10 @@
 
 public class IngestorConfig {
     public static final Config<Integer> INGESTOR_QUEUE_BUFFER_MAX_COUNT =
-            Config.intConfig("ingsetor.queue.buffer.max.count", 128);
+            Config.intConfig("ingestor.queue.buffer.max.count", 1024);
 
     public static final Config<Integer> INGESTOR_SENDER_BUFFER_MAX_COUNT =
-            Config.intConfig("ingestor.sender.buffer.max.count", 128);
+            Config.intConfig("ingestor.sender.buffer.max.count", 1024);
 
     public static final Config<Integer> INGESTOR_SENDER_OPERATION_MAX_COUNT =
             Config.intConfig("ingestor.sender.operation.max.count", 8192);
diff --git a/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/StoreConfig.java b/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/StoreConfig.java
index 6c364681eaf8..23f96dbb2e49 100644
--- a/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/StoreConfig.java
+++ b/interactive_engine/common/src/main/java/com/alibaba/graphscope/groot/common/config/StoreConfig.java
@@ -21,7 +21,7 @@ public class StoreConfig {
             Config.intConfig("store.write.thread.count", 1);
 
     public static final Config<Integer> STORE_QUEUE_BUFFER_SIZE =
-            Config.intConfig("store.queue.buffer.size", 128);
+            Config.intConfig("store.queue.buffer.size", 1024);
 
     public static final Config<Long> STORE_QUEUE_WAIT_MS =
             Config.longConfig("store.queue.wait.ms", 3000L);
diff --git a/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/ingestor/BatchSender.java b/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/ingestor/BatchSender.java
index ddcc86fe90e6..12d95b1b0f3a 100644
--- a/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/ingestor/BatchSender.java
+++ b/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/ingestor/BatchSender.java
@@ -36,15 +36,14 @@ public class BatchSender implements MetricsAgent {
     public static final String SEND_RECORDS_PER_SECOND = "send.records.per.second";
     public static final String SEND_RECORDS_TOTAL = "send.records.total";
     public static final String SEND_BUFFER_BATCH_COUNT = "send.buffer.batch.count";
-    public static final String SEND_CALLBACK_LATENCY_PER_SECOND_MS =
-            "send.callback.latency.per.second.ms";
+    public static final String SEND_CALLBACK_LATENCY = "send.callback.latency.per.second.ms";
 
-    private MetaService metaService;
-    private StoreWriter storeWriter;
+    private final MetaService metaService;
+    private final StoreWriter storeWriter;
 
-    private int bufferSize;
-    private int storeCount;
-    private int sendOperationLimit;
+    private final int bufferSize;
+    private final int storeCount;
+    private final int sendOperationLimit;
 
     private List<BlockingQueue<StoreDataBatch>> storeSendBuffer;
     private BlockingQueue<SendTask> sendTasks;
@@ -57,7 +56,7 @@ public class BatchSender implements MetricsAgent {
     private AvgMetric sendRecordsMetric;
     private List<AvgMetric> bufferBatchCountMetrics;
     private List<AvgMetric> callbackLatencyMetrics;
-    private int receiverQueueSize;
+    private final int receiverQueueSize;
 
     public BatchSender(
             Configs configs,
@@ -72,7 +71,7 @@ public BatchSender(
         this.sendOperationLimit = IngestorConfig.INGESTOR_SENDER_OPERATION_MAX_COUNT.get(configs);
         this.receiverQueueSize = StoreConfig.STORE_QUEUE_BUFFER_SIZE.get(configs);
         initMetrics();
-        metricsCollector.register(this, () -> updateMetrics());
+        metricsCollector.register(this, this::updateMetrics);
     }
 
     public void start() {
@@ -299,7 +298,7 @@ public Map<String, String> getMetrics() {
                                         .map(q -> q.size())
                                         .collect(Collectors.toList())));
                 put(
-                        SEND_CALLBACK_LATENCY_PER_SECOND_MS,
+                        SEND_CALLBACK_LATENCY,
                         String.valueOf(
                                 callbackLatencyMetrics.stream()
                                         .map(m -> (int) (1000 * m.getAvg()))
@@ -316,7 +315,7 @@ public String[] getMetricKeys() {
             SEND_RECORDS_PER_SECOND,
             SEND_RECORDS_TOTAL,
             SEND_BUFFER_BATCH_COUNT,
-            SEND_CALLBACK_LATENCY_PER_SECOND_MS
+            SEND_CALLBACK_LATENCY
         };
     }
 }
diff --git a/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/store/SnapshotSortQueue.java b/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/store/SnapshotSortQueue.java
index 0b1bff73cd3e..0e07e5768044 100644
--- a/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/store/SnapshotSortQueue.java
+++ b/interactive_engine/groot-module/src/main/java/com/alibaba/graphscope/groot/store/SnapshotSortQueue.java
@@ -34,15 +34,15 @@ public class SnapshotSortQueue {
 
     private static final Logger logger = LoggerFactory.getLogger(SnapshotSortQueue.class);
 
-    private long queueWaitMs;
-    private int queueCount;
+    private final long queueWaitMs;
+    private final int queueCount;
 
-    private List<BlockingQueue<StoreDataBatch>> innerQueues;
-    private List<StoreDataBatch> queueHeads;
+    private final List<BlockingQueue<StoreDataBatch>> innerQueues;
+    private final List<StoreDataBatch> queueHeads;
 
     private int currentPollQueueIdx;
     private long currentPollSnapshotId;
-    private AtomicInteger size;
+    private final AtomicInteger size;
 
     public SnapshotSortQueue(Configs configs, MetaService metaService) {
         this.currentPollSnapshotId = -1L;