diff --git a/src/storage/slog/ob_storage_logger_manager.cpp b/src/storage/slog/ob_storage_logger_manager.cpp
index 3b07cd7c14..b05d00fc34 100644
--- a/src/storage/slog/ob_storage_logger_manager.cpp
+++ b/src/storage/slog/ob_storage_logger_manager.cpp
@@ -52,9 +52,6 @@ int ObStorageLoggerManager::init(
     const bool need_reserved)
 {
   int ret = OB_SUCCESS;
-  const int64_t MAX_CONCURRENT_ITEM_CNT = !lib::is_mini_mode() ?
-      MAX(128, sysconf(_SC_NPROCESSORS_ONLN) * 2) : 64;
-  static const int64_t MAX_TENANT_BUCKET = 63;
 
   if (OB_UNLIKELY(is_inited_)) {
     ret = OB_INIT_TWICE;
@@ -64,9 +61,9 @@ int ObStorageLoggerManager::init(
     STORAGE_REDO_LOG(WARN, "invalid arguments", K(ret), KP(log_dir), K(max_log_file_size));
   } else if (OB_FAIL(prepare_log_buffers(MAX_CONCURRENT_ITEM_CNT, NORMAL_LOG_ITEM_SIZE))) {
     STORAGE_REDO_LOG(WARN, "fail to prepare log buffers", K(ret),
-        K(MAX_CONCURRENT_ITEM_CNT), LITERAL_K(NORMAL_LOG_ITEM_SIZE));
+        LITERAL_K(MAX_CONCURRENT_ITEM_CNT), LITERAL_K(NORMAL_LOG_ITEM_SIZE));
   } else if (OB_FAIL(prepare_log_items(MAX_CONCURRENT_ITEM_CNT))) {
-    STORAGE_REDO_LOG(WARN, "fail to prepare log items", K(ret), K(MAX_CONCURRENT_ITEM_CNT));
+    STORAGE_REDO_LOG(WARN, "fail to prepare log items", K(ret), LITERAL_K(MAX_CONCURRENT_ITEM_CNT));
   } else {
     log_dir_ = log_dir;
     max_log_file_size_ = max_log_file_size;
diff --git a/src/storage/slog/ob_storage_logger_manager.h b/src/storage/slog/ob_storage_logger_manager.h
index 3bd7021b0c..f2a96f6c87 100644
--- a/src/storage/slog/ob_storage_logger_manager.h
+++ b/src/storage/slog/ob_storage_logger_manager.h
@@ -70,7 +70,8 @@ private:
   int get_using_disk_space(int64_t &using_space) const;
 
 private:
-  static constexpr int64_t NORMAL_LOG_ITEM_SIZE = 512 * 1024; //512KB
+  static constexpr int64_t NORMAL_LOG_ITEM_SIZE = 8 * 1024; //8KB
+  static constexpr int64_t MAX_CONCURRENT_ITEM_CNT = 1024;
   static constexpr int64_t RESERVED_DISK_SIZE = 4 * 1024 * 1024 * 1024L; // 4G
 
   common::ObArenaAllocator allocator_;
diff --git a/unittest/storage/slog/test_storage_logger_manager.cpp b/unittest/storage/slog/test_storage_logger_manager.cpp
index 9aea7e43f3..b426a651ca 100644
--- a/unittest/storage/slog/test_storage_logger_manager.cpp
+++ b/unittest/storage/slog/test_storage_logger_manager.cpp
@@ -51,8 +51,7 @@ public:
 
 public:
   static const int64_t MAX_FILE_SIZE = 256 * 1024 * 1024;
-  const int64_t MAX_CONCURRENT_ITEM_CNT = !lib::is_mini_mode() ?
-      MAX(128, sysconf(_SC_NPROCESSORS_ONLN) * 2) : 64;
+  const int64_t MAX_CONCURRENT_ITEM_CNT = 1024;
 
 public:
   char dir_[128];
@@ -102,7 +101,7 @@ TEST_F(TestStorageLoggerManager, test_manager_basic)
       log_item, 1);
   ASSERT_NE(OB_SUCCESS, ret);
   // test normal item allocation (not local)
-  ret = SLOGGERMGR.alloc_item(30 * 1024, log_item, 15);
+  ret = SLOGGERMGR.alloc_item(3 * 1024, log_item, 15);
   ASSERT_EQ(OB_SUCCESS, ret);
   ASSERT_TRUE(log_item->is_inited_);
   ASSERT_FALSE(log_item->is_local_);
@@ -220,7 +219,7 @@ TEST_F (TestStorageLoggerManager, test_build_item)
   data_len = dummy_header.get_serialize_size() +
             dummy_entry.get_serialize_size() +
             12;
-  buf_size = 512<<10;
+  buf_size = 8<<10;
   ASSERT_EQ(data_len, log_item->get_data_len());
   ASSERT_EQ(data_len, log_item->get_log_data_len());
   ASSERT_EQ(buf_size, log_item->get_buf_size());
@@ -280,7 +279,7 @@ TEST_F (TestStorageLoggerManager, test_build_item)
   data_len = dummy_header.get_serialize_size() +
              3 * dummy_entry.get_serialize_size() +
              111;
-  buf_size = 512<<10;
+  buf_size = 8<<10;
   ASSERT_EQ(data_len, log_item->get_data_len());
   ASSERT_EQ(data_len, log_item->get_log_data_len());
   ASSERT_EQ(buf_size, log_item->get_buf_size());