diff --git a/src/gausskernel/process/threadpool/knl_session.cpp b/src/gausskernel/process/threadpool/knl_session.cpp
index 2a22964f8..f7185179f 100755
--- a/src/gausskernel/process/threadpool/knl_session.cpp
+++ b/src/gausskernel/process/threadpool/knl_session.cpp
@@ -1416,6 +1416,9 @@ static void knl_u_spq_init(knl_u_spq_context* spq_cxt)
     spq_cxt->spq_opt_initialized = false;
     spq_cxt->remoteQuerys = NIL;
     spq_cxt->snapshot = (SnapshotData*)palloc0(sizeof(SnapshotData));
+    spq_cxt->mdcache_invalidation_counter_registered = false;
+    spq_cxt->mdcache_invalidation_counter = 0;
+    spq_cxt->last_mdcache_invalidation_counter = 0;
 }
 #endif
 
diff --git a/src/include/knl/knl_session.h b/src/include/knl/knl_session.h
index e672b35f9..764ed6b12 100644
--- a/src/include/knl/knl_session.h
+++ b/src/include/knl/knl_session.h
@@ -2753,6 +2753,9 @@ typedef struct knl_u_spq_context {
     spqos::CWorkerPoolManager* m_worker_pool_manager;
     /* mdcache */
     spqos::CCache<spqmd::IMDCacheObject *, spqopt::CMDKey *> *m_pcache;
+    bool mdcache_invalidation_counter_registered;
+    int64 mdcache_invalidation_counter;
+    int64 last_mdcache_invalidation_counter;
     /* cache factory */
     spqos::CCacheFactory* m_factory;
     spqos::CMessageRepository *m_repository;