diff --git a/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp b/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
index ab79a624a..c101d8b7a 100644
--- a/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
+++ b/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
@@ -378,7 +378,7 @@ ObTenantCtxAllocator *ObMallocAllocator::take_off_tenant_allocator(uint64_t tena
 void ObMallocAllocator::set_root_allocator()
 {
   int ret = OB_SUCCESS;
-  static char buf[sizeof(ObTenantCtxAllocator) * ObCtxIds::MAX_CTX_ID];
+  static char buf[sizeof(ObTenantCtxAllocator) * ObCtxIds::MAX_CTX_ID] __attribute__((__aligned__(16)));
   ObTenantCtxAllocator *allocator = NULL;
   abort_unless(OB_SUCCESS == create_tenant_allocator(OB_SERVER_TENANT_ID, buf, allocator));
   abort_unless(OB_SUCCESS == add_tenant_allocator(allocator));
diff --git a/deps/oblib/src/lib/resource/ob_resource_mgr.cpp b/deps/oblib/src/lib/resource/ob_resource_mgr.cpp
index bcef3e05a..58a37707a 100644
--- a/deps/oblib/src/lib/resource/ob_resource_mgr.cpp
+++ b/deps/oblib/src/lib/resource/ob_resource_mgr.cpp
@@ -611,7 +611,7 @@ int ObResourceMgr::create_tenant_resource_mgr_unsafe(const uint64_t tenant_id,
     ret = OB_INVALID_ARGUMENT;
     LOG_WARN("invalid argument", K(ret), K(tenant_id));
   } else if (OB_UNLIKELY(OB_SERVER_TENANT_ID == tenant_id)) {
-    static char buf[sizeof(ObTenantResourceMgr)];
+    static char buf[sizeof(ObTenantResourceMgr)] __attribute__((__aligned__(16)));
     ptr = buf;
   } else {
     ObMemAttr attr(OB_SERVER_TENANT_ID, "TntResourceMgr");