diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index a1a6cd4519294fa99a5bee41ae21aad4c1731373..969724cc8d0ebd68f3a3cbdf5716bdcb4efb5ff9 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -270,7 +270,7 @@ if(${JEMALLOC_ENABLED})
         PREFIX        "jemalloc"
         SOURCE_DIR    ${CMAKE_CURRENT_SOURCE_DIR}/jemalloc
         BUILD_IN_SOURCE     1
-        CONFIGURE_COMMAND   ./autogen.sh COMMAND ./configure --prefix=${CMAKE_BINARY_DIR}/build/ --disable-initial-exec-tls
+        CONFIGURE_COMMAND   ./autogen.sh COMMAND ./configure --prefix=${CMAKE_BINARY_DIR}/build/ --disable-initial-exec-tls --with-malloc-conf='background_thread:true,metadata_thp:auto'
         BUILD_COMMAND       ${MAKE}
     )
     INCLUDE_DIRECTORIES(${CMAKE_BINARY_DIR}/build/include)
diff --git a/include/libs/qcom/query.h b/include/libs/qcom/query.h
index c179d69960ac80eef69a04e721fb6c582560ef59..777fe1c4dfecd7b14c9f4395f519782a8c45762c 100644
--- a/include/libs/qcom/query.h
+++ b/include/libs/qcom/query.h
@@ -230,7 +230,7 @@ int32_t cloneTableMeta(STableMeta* pSrc, STableMeta** pDst);
 int32_t cloneDbVgInfo(SDBVgInfo* pSrc, SDBVgInfo** pDst);
 
 extern int32_t (*queryBuildMsg[TDMT_MAX])(void* input, char** msg, int32_t msgSize, int32_t* msgLen,
-                                          void* (*mallocFp)(int32_t));
+                                          void* (*mallocFp)(int64_t));
 extern int32_t (*queryProcessMsgRsp[TDMT_MAX])(void* output, char* msg, int32_t msgSize);
 
 #define SET_META_TYPE_NULL(t)       (t) = META_TYPE_NULL_TABLE
diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 56c5750475e32b6c2606cfdbc0e4c5e75faabf46..53edcd4fee9bb9af6ab0d44235159b90990cf5c1 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -123,9 +123,9 @@ void    rpcCleanup();
 void *rpcOpen(const SRpcInit *pRpc);
 void  rpcClose(void *);
 void  rpcCloseImpl(void *);
-void *rpcMallocCont(int32_t contLen);
+void *rpcMallocCont(int64_t contLen);
 void  rpcFreeCont(void *pCont);
-void *rpcReallocCont(void *ptr, int32_t contLen);
+void *rpcReallocCont(void *ptr, int64_t contLen);
 
 // Because taosd supports multi-process mode
 // These functions should not be used on the server side
diff --git a/include/os/osMemory.h b/include/os/osMemory.h
index 3146590d6c9e81a415c7efce52ff16167f886b75..7ec8366ee4cb584dc41aa0ce94d5c54f6405964e 100644
--- a/include/os/osMemory.h
+++ b/include/os/osMemory.h
@@ -29,12 +29,12 @@ extern "C" {
 #define free    FREE_FUNC_TAOS_FORBID
 #endif
 
-void   *taosMemoryMalloc(int32_t size);
-void   *taosMemoryCalloc(int32_t num, int32_t size);
-void   *taosMemoryRealloc(void *ptr, int32_t size);
+void   *taosMemoryMalloc(int64_t size);
+void   *taosMemoryCalloc(int64_t num, int64_t size);
+void   *taosMemoryRealloc(void *ptr, int64_t size);
 void   *taosMemoryStrDup(const char *ptr);
 void    taosMemoryFree(void *ptr);
-int32_t taosMemorySize(void *ptr);
+int64_t taosMemorySize(void *ptr);
 void    taosPrintBackTrace();
 
 #define taosMemoryFreeClear(ptr)   \
diff --git a/source/libs/catalog/src/ctgRemote.c b/source/libs/catalog/src/ctgRemote.c
index 7b8c66e36889dde2fe0c624c6adb099151455501..744d6eab0693293df5887e613539cc9935beba6d 100644
--- a/source/libs/catalog/src/ctgRemote.c
+++ b/source/libs/catalog/src/ctgRemote.c
@@ -638,7 +638,7 @@ int32_t ctgGetQnodeListFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, SArray
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_QNODE_LIST;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get qnode list from mnode, mgmtEpInUse:%d", pConn->mgmtEps.inUse);
 
@@ -692,7 +692,7 @@ int32_t ctgGetDnodeListFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, SArray
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_DNODE_LIST;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get dnode list from mnode, mgmtEpInUse:%d", pConn->mgmtEps.inUse);
 
@@ -743,7 +743,7 @@ int32_t ctgGetDBVgInfoFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, SBuildU
   int32_t   msgLen = 0;
   int32_t   reqType = TDMT_MND_USE_DB;
   SCtgTask* pTask = tReq ? tReq->pTask : NULL;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get db vgInfo from mnode, dbFName:%s", input->db);
 
@@ -795,7 +795,7 @@ int32_t ctgGetDBCfgFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, const char
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_GET_DB_CFG;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get db cfg from mnode, dbFName:%s", dbFName);
 
@@ -850,7 +850,7 @@ int32_t ctgGetIndexInfoFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, const
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_GET_INDEX;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get index from mnode, indexName:%s", indexName);
 
@@ -905,7 +905,7 @@ int32_t ctgGetTbIndexFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, SName* n
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_GET_TABLE_INDEX;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
   char tbFName[TSDB_TABLE_FNAME_LEN];
   tNameExtractFullName(name, tbFName);
 
@@ -962,7 +962,7 @@ int32_t ctgGetUdfInfoFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, const ch
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_RETRIEVE_FUNC;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get udf info from mnode, funcName:%s", funcName);
 
@@ -1017,7 +1017,7 @@ int32_t ctgGetUserDbAuthFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, const
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_GET_USER_AUTH;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get user auth from mnode, user:%s", user);
 
@@ -1077,7 +1077,7 @@ int32_t ctgGetTbMetaFromMnodeImpl(SCatalog* pCtg, SRequestConnInfo* pConn, char*
   int32_t          reqType = TDMT_MND_TABLE_META;
   char             tbFName[TSDB_TABLE_FNAME_LEN];
   sprintf(tbFName, "%s.%s", dbFName, tbName);
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   ctgDebug("try to get table meta from mnode, tbFName:%s", tbFName);
 
@@ -1140,7 +1140,7 @@ int32_t ctgGetTbMetaFromVnode(SCatalog* pCtg, SRequestConnInfo* pConn, const SNa
   int32_t reqType = TDMT_VND_TABLE_META;
   char    tbFName[TSDB_TABLE_FNAME_LEN];
   sprintf(tbFName, "%s.%s", dbFName, pTableName->tname);
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   SEp* pEp = &vgroupInfo->epSet.eps[vgroupInfo->epSet.inUse];
   ctgDebug("try to get table meta from vnode, vgId:%d, ep num:%d, ep %s:%d, tbFName:%s", vgroupInfo->vgId,
@@ -1209,7 +1209,7 @@ int32_t ctgGetTableCfgFromVnode(SCatalog* pCtg, SRequestConnInfo* pConn, const S
   int32_t reqType = TDMT_VND_TABLE_CFG;
   char    tbFName[TSDB_TABLE_FNAME_LEN];
   tNameExtractFullName(pTableName, tbFName);
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
   char dbFName[TSDB_DB_FNAME_LEN];
   tNameGetFullDbName(pTableName, dbFName);
   SBuildTableInput bInput = {.vgId = vgroupInfo->vgId, .dbFName = dbFName, .tbName = (char*)pTableName->tname};
@@ -1274,7 +1274,7 @@ int32_t ctgGetTableCfgFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, const S
   int32_t reqType = TDMT_MND_TABLE_CFG;
   char    tbFName[TSDB_TABLE_FNAME_LEN];
   tNameExtractFullName(pTableName, tbFName);
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
   char dbFName[TSDB_DB_FNAME_LEN];
   tNameGetFullDbName(pTableName, dbFName);
   SBuildTableInput bInput = {.vgId = 0, .dbFName = dbFName, .tbName = (char*)pTableName->tname};
@@ -1326,7 +1326,7 @@ int32_t ctgGetSvrVerFromMnode(SCatalog* pCtg, SRequestConnInfo* pConn, char** ou
   char*   msg = NULL;
   int32_t msgLen = 0;
   int32_t reqType = TDMT_MND_SERVER_VERSION;
-  void* (*mallocFp)(int32_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
+  void* (*mallocFp)(int64_t) = pTask ? taosMemoryMalloc : rpcMallocCont;
 
   qDebug("try to get svr ver from mnode");
 
diff --git a/source/libs/qcom/src/querymsg.c b/source/libs/qcom/src/querymsg.c
index 621a38ea4a88d5b501abd913780204c719c4dfc0..80ba356e8f194f13c21af403bf9be378a0599134 100644
--- a/source/libs/qcom/src/querymsg.c
+++ b/source/libs/qcom/src/querymsg.c
@@ -24,8 +24,8 @@
 #pragma GCC diagnostic ignored "-Wformat-truncation"
 #endif
 
-int32_t (*queryBuildMsg[TDMT_MAX])(void *input, char **msg, int32_t msgSize, int32_t *msgLen,
-                                   void *(*mallocFp)(int32_t)) = {0};
+int32_t (*queryBuildMsg[TDMT_MAX])(void *input, char **msg, int32_t msgSize, int32_t *msgLen, 
+                                   void *(*mallocFp)(int64_t)) = {0};
 int32_t (*queryProcessMsgRsp[TDMT_MAX])(void *output, char *msg, int32_t msgSize) = {0};
 
 int32_t queryBuildUseDbOutput(SUseDbOutput *pOut, SUseDbRsp *usedbRsp) {
@@ -67,8 +67,8 @@ int32_t queryBuildUseDbOutput(SUseDbOutput *pOut, SUseDbRsp *usedbRsp) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildTableMetaReqMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen,
-                                  void *(*mallcFp)(int32_t)) {
+int32_t queryBuildTableMetaReqMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, 
+                                  void *(*mallcFp)(int64_t)) {
   SBuildTableInput *pInput = input;
   if (NULL == input || NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
@@ -91,7 +91,7 @@ int32_t queryBuildTableMetaReqMsg(void *input, char **msg, int32_t msgSize, int3
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildUseDbMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildUseDbMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   SBuildUseDBInput *pInput = input;
   if (NULL == pInput || NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
@@ -114,7 +114,7 @@ int32_t queryBuildUseDbMsg(void *input, char **msg, int32_t msgSize, int32_t *ms
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildQnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildQnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -132,7 +132,7 @@ int32_t queryBuildQnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildDnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildDnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -150,7 +150,7 @@ int32_t queryBuildDnodeListMsg(void *input, char **msg, int32_t msgSize, int32_t
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetSerVerMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetSerVerMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -167,7 +167,7 @@ int32_t queryBuildGetSerVerMsg(void *input, char **msg, int32_t msgSize, int32_t
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetDBCfgMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetDBCfgMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -185,7 +185,7 @@ int32_t queryBuildGetDBCfgMsg(void *input, char **msg, int32_t msgSize, int32_t
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetIndexMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetIndexMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -203,8 +203,8 @@ int32_t queryBuildGetIndexMsg(void *input, char **msg, int32_t msgSize, int32_t
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildRetrieveFuncMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen,
-                                  void *(*mallcFp)(int32_t)) {
+int32_t queryBuildRetrieveFuncMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, 
+                                  void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -227,7 +227,7 @@ int32_t queryBuildRetrieveFuncMsg(void *input, char **msg, int32_t msgSize, int3
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetUserAuthMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetUserAuthMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -245,7 +245,7 @@ int32_t queryBuildGetUserAuthMsg(void *input, char **msg, int32_t msgSize, int32
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetTbIndexMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetTbIndexMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
@@ -263,7 +263,7 @@ int32_t queryBuildGetTbIndexMsg(void *input, char **msg, int32_t msgSize, int32_
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t queryBuildGetTbCfgMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int32_t)) {
+int32_t queryBuildGetTbCfgMsg(void *input, char **msg, int32_t msgSize, int32_t *msgLen, void *(*mallcFp)(int64_t)) {
   if (NULL == msg || NULL == msgLen) {
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index e5a783292dc56f88432093848d039df3c005a1e2..c82af0d0e9b68a3606718bdef47bb783c7289c54 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -100,8 +100,8 @@ void rpcCloseImpl(void* arg) {
   taosMemoryFree(pRpc);
 }
 
-void* rpcMallocCont(int32_t contLen) {
-  int32_t size = contLen + TRANS_MSG_OVERHEAD;
+void* rpcMallocCont(int64_t contLen) {
+  int64_t size = contLen + TRANS_MSG_OVERHEAD;
   char*   start = taosMemoryCalloc(1, size);
   if (start == NULL) {
     tError("failed to malloc msg, size:%d", size);
@@ -120,11 +120,11 @@ void rpcFreeCont(void* cont) {
   tTrace("rpc free cont:%p", (char*)cont - TRANS_MSG_OVERHEAD);
 }
 
-void* rpcReallocCont(void* ptr, int32_t contLen) {
+void* rpcReallocCont(void* ptr, int64_t contLen) {
   if (ptr == NULL) return rpcMallocCont(contLen);
 
   char*   st = (char*)ptr - TRANS_MSG_OVERHEAD;
-  int32_t sz = contLen + TRANS_MSG_OVERHEAD;
+  int64_t sz = contLen + TRANS_MSG_OVERHEAD;
   st = taosMemoryRealloc(st, sz);
   if (st == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
diff --git a/source/os/src/osMemory.c b/source/os/src/osMemory.c
index 8f026f68907f16953ef8e1149ccaaf908dab2f3a..75a963d5c7551ad290d1d2190c24ab07e1ed0953 100644
--- a/source/os/src/osMemory.c
+++ b/source/os/src/osMemory.c
@@ -228,7 +228,7 @@ void taosPrintBackTrace() {
 void taosPrintBackTrace() { return; }
 #endif
 
-void *taosMemoryMalloc(int32_t size) {
+void *taosMemoryMalloc(int64_t size) {
 #ifdef USE_TD_MEMORY
   void *tmp = malloc(size + sizeof(TdMemoryInfo));
   if (tmp == NULL) return NULL;
@@ -244,7 +244,7 @@ void *taosMemoryMalloc(int32_t size) {
 #endif
 }
 
-void *taosMemoryCalloc(int32_t num, int32_t size) {
+void *taosMemoryCalloc(int64_t num, int64_t size) {
 #ifdef USE_TD_MEMORY
   int32_t memorySize = num * size;
   char   *tmp = calloc(memorySize + sizeof(TdMemoryInfo), 1);
@@ -261,7 +261,7 @@ void *taosMemoryCalloc(int32_t num, int32_t size) {
 #endif
 }
 
-void *taosMemoryRealloc(void *ptr, int32_t size) {
+void *taosMemoryRealloc(void *ptr, int64_t size) {
 #ifdef USE_TD_MEMORY
   if (ptr == NULL) return taosMemoryMalloc(size);
 
@@ -318,7 +318,7 @@ void taosMemoryFree(void *ptr) {
 #endif
 }
 
-int32_t taosMemorySize(void *ptr) {
+int64_t taosMemorySize(void *ptr) {
   if (ptr == NULL) return 0;
 
 #ifdef USE_TD_MEMORY