diff --git a/core/src/db/DBImpl.cpp b/core/src/db/DBImpl.cpp
index 52cf1e668aac6b6496d9d3ea3c0738eb72835ea5..5196c721469733c914f4887f94d53a4256266b63 100644
--- a/core/src/db/DBImpl.cpp
+++ b/core/src/db/DBImpl.cpp
@@ -709,9 +709,9 @@ DBImpl::BackgroundCompaction(std::set<std::string> table_ids) {
 
     meta_ptr_->Archive();
 
-    int ttl = 5 * meta::M_SEC;  // default: file will be deleted after 5 minutes
+    int ttl = 5 * meta::MINUTE;  // default: file will be deleted after 5 minutes
     if (options_.mode_ == DBOptions::MODE::CLUSTER_WRITABLE) {
-        ttl = meta::D_SEC;
+        ttl = meta::DAY;
     }
     meta_ptr_->CleanUpFilesWithTTL(ttl);
 
diff --git a/core/src/db/meta/MetaConsts.h b/core/src/db/meta/MetaConsts.h
index 4e40ff77313507ec9866f10b0a2ac0f784fdb71e..73b25b0b3293b205fba4c50e9c5ba5f05d6b3150 100644
--- a/core/src/db/meta/MetaConsts.h
+++ b/core/src/db/meta/MetaConsts.h
@@ -27,10 +27,10 @@ const size_t US_PS = 1000 * MS_PS;
 const size_t NS_PS = 1000 * US_PS;
 
 const size_t SECOND = 1UL;
-const size_t M_SEC = 60 * SECOND;
-const size_t H_SEC = 60 * M_SEC;
-const size_t D_SEC = 24 * H_SEC;
-const size_t W_SEC = 7 * D_SEC;
+const size_t MINUTE = 60 * SECOND;
+const size_t HOUR = 60 * MINUTE;
+const size_t DAY = 24 * HOUR;
+const size_t WEEK = 7 * DAY;
 
 }  // namespace meta
 }  // namespace engine
diff --git a/core/src/db/meta/MySQLMetaImpl.cpp b/core/src/db/meta/MySQLMetaImpl.cpp
index c7a054524c241456a05e83e5481e75c540a4e773..d5a9bf6d612b73a6b06c104ce5dac3067b26cc15 100644
--- a/core/src/db/meta/MySQLMetaImpl.cpp
+++ b/core/src/db/meta/MySQLMetaImpl.cpp
@@ -1395,7 +1395,7 @@ MySQLMetaImpl::Archive() {
         auto& criteria = kv.first;
         auto& limit = kv.second;
         if (criteria == engine::ARCHIVE_CONF_DAYS) {
-            size_t usecs = limit * D_SEC * US_PS;
+            size_t usecs = limit * DAY * US_PS;
             int64_t now = utils::GetMicroSecTimeStamp();
 
             try {
diff --git a/core/src/db/meta/SqliteMetaImpl.cpp b/core/src/db/meta/SqliteMetaImpl.cpp
index 4123858b4409b3df71f66eab373db64fe0a23be5..34a3b6b6ea892be0baef87602a4f072082361180 100644
--- a/core/src/db/meta/SqliteMetaImpl.cpp
+++ b/core/src/db/meta/SqliteMetaImpl.cpp
@@ -949,7 +949,7 @@ SqliteMetaImpl::Archive() {
         auto &criteria = kv.first;
         auto &limit = kv.second;
         if (criteria == engine::ARCHIVE_CONF_DAYS) {
-            int64_t usecs = limit * D_SEC * US_PS;
+            int64_t usecs = limit * DAY * US_PS;
             int64_t now = utils::GetMicroSecTimeStamp();
             try {
                 //multi-threads call sqlite update may get exception('bad logic', etc), so we add a lock here
diff --git a/core/unittest/db/test_meta.cpp b/core/unittest/db/test_meta.cpp
index e2a9c980896b4fd5aa16247e2bf7c0eeb85b1b82..09e3d7b00c74d8524a1aa90ba4b741856a31d573 100644
--- a/core/unittest/db/test_meta.cpp
+++ b/core/unittest/db/test_meta.cpp
@@ -141,7 +141,7 @@ TEST_F(MetaTest, ARCHIVE_TEST_DAYS) {
         status = impl.CreateTableFile(table_file);
         table_file.file_type_ = milvus::engine::meta::TableFileSchema::NEW;
         int day = rand_r(&seed) % (days_num * 2);
-        table_file.created_on_ = ts - day * milvus::engine::meta::D_SEC * milvus::engine::meta::US_PS - 10000;
+        table_file.created_on_ = ts - day * milvus::engine::meta::DAY * milvus::engine::meta::US_PS - 10000;
         status = impl.UpdateTableFile(table_file);
         files.push_back(table_file);
         days.push_back(day);
diff --git a/core/unittest/db/test_meta_mysql.cpp b/core/unittest/db/test_meta_mysql.cpp
index 835ea42492d0598603ba69a830ffc422dced0295..023d1f421b60f5a77d67c64ce42d589a5a48fc83 100644
--- a/core/unittest/db/test_meta_mysql.cpp
+++ b/core/unittest/db/test_meta_mysql.cpp
@@ -145,7 +145,7 @@ TEST_F(MySqlMetaTest, ARCHIVE_TEST_DAYS) {
         status = impl.CreateTableFile(table_file);
         table_file.file_type_ = milvus::engine::meta::TableFileSchema::NEW;
         int day = rand_r(&seed) % (days_num * 2);
-        table_file.created_on_ = ts - day * milvus::engine::meta::D_SEC * milvus::engine::meta::US_PS - 10000;
+        table_file.created_on_ = ts - day * milvus::engine::meta::DAY * milvus::engine::meta::US_PS - 10000;
         status = impl.UpdateTableFile(table_file);
         files.push_back(table_file);
         days.push_back(day);