diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index 96b9617fc4..f0a35b7423 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -69,6 +69,10 @@ extern float   tsSelectivityRatio;
 extern int32_t tsTagFilterResCacheSize;
 
 // queue & threads
+extern int32_t tsQueryMinConcurrentTaskNum;
+extern int32_t tsQueryMaxConcurrentTaskNum;
+extern int32_t tsQueryConcurrentTaskNum;
+extern int32_t tsNumOfQueryThreads;
 extern int32_t tsNumOfRpcThreads;
 extern int32_t tsNumOfRpcSessions;
 extern int32_t tsTimeToGetAvailableConn;
diff --git a/include/os/osMemPool.h b/include/os/osMemPool.h
index bd49ded309..2af0d46c19 100644
--- a/include/os/osMemPool.h
+++ b/include/os/osMemPool.h
@@ -24,18 +24,39 @@ extern "C" {
 #define MEMPOOL_MAX_CHUNK_SIZE (1 << 30)
 #define MEMPOOL_MIN_CHUNK_SIZE (1 << 20)
 
-typedef enum MemPoolEvictPolicy{
+typedef enum MemPoolEvictPolicy {
   E_EVICT_ALL = 1,
   E_EVICT_NONE,
   E_EVICT_AUTO,
   E_EVICT_MAX_VALUE, // no used
 } MemPoolEvictPolicy;
 
+typedef enum MemPoolUsageLevel {
+  E_MEM_USAGE_LOW = 0,
+  E_MEM_USAGE_MIDDLE,
+  E_MEM_USAGE_HIGH,
+  E_MEM_USAGE_EXTRAME,
+  E_MEM_USAGE_MAX_VALUE
+} MemPoolUsageLevel;
+
+typedef void (*decConcSessionNum)(void);
+typedef void (*incConcSessionNum)(void);
+typedef void (*setConcSessionNum)(int32_t);
+
+typedef struct SMemPoolCallBack {
+  decConcSessionNum decSessFp;
+  incConcSessionNum incSessFp;
+  setConcSessionNum setSessFp;
+} SMemPoolCallBack;
+
 typedef struct SMemPoolCfg {
   int64_t            maxSize;
+  int64_t            sessionExpectSize;
   int32_t            chunkSize;
   int32_t            threadNum;
+  int8_t             usageLevel[E_MEM_USAGE_MAX_VALUE];
   MemPoolEvictPolicy evicPolicy;
+  SMemPoolCallBack   cb;
 } SMemPoolCfg;
 
 void    taosMemPoolModInit(void);
@@ -52,7 +73,7 @@ void    taosMemPoolClose(void* poolHandle);
 void    taosMemPoolModDestroy(void);
 void    taosAutoMemoryFree(void *ptr);
 int32_t taosMemPoolInitSession(void* poolHandle, void** ppSession);
-void    taosMemPoolDestroySession(void* session);
+void    taosMemPoolDestroySession(void* poolHandle, void* session);
 
 
 extern threadlocal void* threadPoolHandle;
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index ba49ef929e..9d020f98ac 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -146,6 +146,7 @@ int32_t  taosGetErrSize();
 #define TSDB_CODE_FAILED_TO_CONNECT_S3          TAOS_DEF_ERROR_CODE(0, 0x0135)
 #define TSDB_CODE_MSG_PREPROCESSED              TAOS_DEF_ERROR_CODE(0, 0x0136) // internal
 #define TSDB_CODE_INVALID_MEM_POOL_PARAM        TAOS_DEF_ERROR_CODE(0, 0x0137)
+#define TSDB_CODE_SYSTEM_ERROR                  TAOS_DEF_ERROR_CODE(0, 0x0138)
 
 //client
 #define TSDB_CODE_TSC_INVALID_OPERATION         TAOS_DEF_ERROR_CODE(0, 0x0200)
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 110fb23b87..45a1a64393 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -57,11 +57,16 @@ int32_t tsShellActivityTimer = 3;  // second
 int8_t  tsQueryUseMemoryPool = 1;
 
 // queue & threads
+int32_t tsQueryMinConcurrentTaskNum = 1;
+int32_t tsQueryMaxConcurrentTaskNum = 0;
+int32_t tsQueryConcurrentTaskNum = 0;
+
 int32_t tsNumOfRpcThreads = 1;
 int32_t tsNumOfRpcSessions = 30000;
 int32_t tsTimeToGetAvailableConn = 500000;
 int32_t tsKeepAliveIdle = 60;
 
+int32_t tsNumOfQueryThreads = 0;
 int32_t tsNumOfCommitThreads = 2;
 int32_t tsNumOfTaskQueueThreads = 16;
 int32_t tsNumOfMnodeQueryThreads = 16;
diff --git a/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c b/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
index 885086e37a..e77b670d6e 100644
--- a/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
+++ b/source/dnode/mgmt/mgmt_mnode/src/mmWorker.c
@@ -209,6 +209,8 @@ int32_t mmStartWorker(SMnodeMgmt *pMgmt) {
     return -1;
   }
 
+  tsNumOfQueryThreads += tsNumOfMnodeQueryThreads;
+
   SSingleWorkerCfg fCfg = {
       .min = tsNumOfMnodeFetchThreads,
       .max = tsNumOfMnodeFetchThreads,
diff --git a/source/dnode/mgmt/mgmt_qnode/src/qmWorker.c b/source/dnode/mgmt/mgmt_qnode/src/qmWorker.c
index 28da0f9c5f..1c7898ec20 100644
--- a/source/dnode/mgmt/mgmt_qnode/src/qmWorker.c
+++ b/source/dnode/mgmt/mgmt_qnode/src/qmWorker.c
@@ -100,8 +100,8 @@ int32_t qmGetQueueSize(SQnodeMgmt *pMgmt, int32_t vgId, EQueueType qtype) {
 
 int32_t qmStartWorker(SQnodeMgmt *pMgmt) {
   SSingleWorkerCfg queryCfg = {
-      .min = tsNumOfVnodeQueryThreads,
-      .max = tsNumOfVnodeQueryThreads,
+      .min = tsNumOfQnodeQueryThreads,
+      .max = tsNumOfQnodeQueryThreads,
       .name = "qnode-query",
       .fp = (FItem)qmProcessQueue,
       .param = pMgmt,
@@ -112,6 +112,8 @@ int32_t qmStartWorker(SQnodeMgmt *pMgmt) {
     return -1;
   }
 
+  tsNumOfQueryThreads += tsNumOfQnodeQueryThreads;
+
   SSingleWorkerCfg fetchCfg = {
       .min = tsNumOfQnodeFetchThreads,
       .max = tsNumOfQnodeFetchThreads,
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
index 7b7c51bbc7..b882df6ba3 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
@@ -399,6 +399,8 @@ int32_t vmStartWorker(SVnodeMgmt *pMgmt) {
   pQPool->max = tsNumOfVnodeQueryThreads;
   if (tQWorkerInit(pQPool) != 0) return -1;
 
+  tsNumOfQueryThreads += tsNumOfVnodeQueryThreads;
+
   SAutoQWorkerPool *pStreamPool = &pMgmt->streamPool;
   pStreamPool->name = "vnode-stream";
   pStreamPool->ratio = tsRatioOfVnodeStreamThreads;
diff --git a/source/libs/qworker/inc/qwInt.h b/source/libs/qworker/inc/qwInt.h
index d4832ade40..b28254d91d 100644
--- a/source/libs/qworker/inc/qwInt.h
+++ b/source/libs/qworker/inc/qwInt.h
@@ -44,6 +44,15 @@ extern "C" {
 #define QW_MIN_RESERVE_MEM_SIZE        (512 * 1048576)
 #define QW_MIN_MEM_POOL_SIZE           (256 * 1048576)
 
+#define QW_DEFAULT_THREAD_TASK_NUM     3
+
+enum {
+  QW_CONC_TASK_LEVEL_LOW = 1,
+  QW_CONC_TASK_LEVEL_MIDDLE,
+  QW_CONC_TASK_LEVEL_HIGH,
+  QW_CONC_TASK_LEVEL_FULL
+};
+
 enum {
   QW_PHASE_PRE_QUERY = 1,
   QW_PHASE_POST_QUERY,
@@ -222,18 +231,25 @@ typedef struct SQWorkerMgmt {
   int32_t    paramIdx;
 } SQWorkerMgmt;
 
+typedef struct SQueryMgmt {
+  SRWLatch taskMgmtLock;
+  int32_t  concTaskLevel;
+  
+  void*   memPoolHandle;
+} SQueryMgmt;
+
 #define QW_CTX_NOT_EXISTS_ERR_CODE(mgmt) (atomic_load_8(&(mgmt)->nodeStopped) ? TSDB_CODE_VND_STOPPED : TSDB_CODE_QRY_TASK_CTX_NOT_EXIST)
 
 #define QW_FPARAMS_DEF SQWorker *mgmt, uint64_t sId, uint64_t qId, uint64_t tId, int64_t rId, int32_t eId
 #define QW_IDS()       sId, qId, tId, rId, eId
 #define QW_FPARAMS()   mgmt, QW_IDS()
 
-extern void* gQueryPoolHandle;
+extern SQueryMgmt gQueryMgmt;
 
 #define QW_SINK_ENABLE_MEMPOOL(_ctx)                                              \
   do {                                                                            \
     if ((_ctx)->sinkWithMemPool) {                                                \
-      taosEnableMemoryPoolUsage(gQueryPoolHandle, (_ctx)->memPoolSession);        \
+      taosEnableMemoryPoolUsage(gQueryMgmt.memPoolHandle, (_ctx)->memPoolSession);        \
     }                                                                             \
   } while (0)
 
diff --git a/source/libs/qworker/src/qwMem.c b/source/libs/qworker/src/qwMem.c
index adb5bc363e..932fb7b1fc 100644
--- a/source/libs/qworker/src/qwMem.c
+++ b/source/libs/qworker/src/qwMem.c
@@ -1,8 +1,6 @@
 #include "qwInt.h"
 #include "qworker.h"
 
-void* gQueryPoolHandle = NULL;
-
 int32_t qwGetMemPoolMaxMemSize(int64_t totalSize, int64_t* maxSize) {
   int64_t reserveSize = TMAX(totalSize * QW_DEFAULT_RESERVE_MEM_PERCENT / 100 / 1048576 * 1048576, QW_MIN_RESERVE_MEM_SIZE);
   int64_t availSize = (totalSize - reserveSize) / 1048576 * 1048576;
@@ -21,6 +19,28 @@ int32_t qwGetMemPoolChunkSize(int64_t totalSize, int32_t threadNum, int32_t* chu
   return TSDB_CODE_SUCCESS;
 }
 
+void qwSetConcurrentTaskNum(int32_t taskNum) {
+  int32_t finTaskNum = TMIN(taskNum, tsNumOfQueryThreads * QW_DEFAULT_THREAD_TASK_NUM);
+  
+  if (tsQueryMaxConcurrentTaskNum > 0) {
+    finTaskNum = TMIN(taskNum, tsQueryMaxConcurrentTaskNum);
+  }
+  finTaskNum = TMAX(finTaskNum, tsQueryMinConcurrentTaskNum);
+
+  atomic_store_32(&tsQueryConcurrentTaskNum, finTaskNum);
+
+  atomic_store_32(&gQueryMgmt.concTaskLevel, QW_CONC_TASK_LEVEL_FULL);
+}
+
+void qwDecConcurrentTaskNum(void) {
+  int32_t concTaskLevel = atomic_load_32(&gQueryMgmt.concTaskLevel);
+  if (concTaskLevel < QW_CONC_TASK_LEVEL_LOW) {
+    qError("Unable to decrease concurrent task num, current task level:%d", concTaskLevel);
+    return;
+  }
+
+  
+}
 
 void qwInitQueryPool(void) {
   int64_t memSize = 0;
@@ -37,13 +57,19 @@ void qwInitQueryPool(void) {
 
   cfg.threadNum = 10; //TODO
   cfg.evicPolicy = E_EVICT_AUTO; //TODO
+  cfg.cb.setSessFp = qwSetConcurrentTaskNum;
+  cfg.cb.decSessFp = qwDecConcurrentTaskNum;
+  cfg.cb.incSessFp = qwIncConcurrentTaskNum;
 
   code = qwGetMemPoolChunkSize(cfg.maxSize, cfg.threadNum, &cfg.chunkSize);
   if (TSDB_CODE_SUCCESS != code) {
     return;
   }  
 
-  taosMemPoolOpen(QW_QUERY_MEM_POOL_NAME, &cfg, &gQueryPoolHandle);
+  code = taosMemPoolOpen(QW_QUERY_MEM_POOL_NAME, &cfg, &gQueryMgmt.memPoolHandle);
+  if (TSDB_CODE_SUCCESS != code) {
+    return;
+  }  
 }
 
 
diff --git a/source/libs/qworker/src/qwUtil.c b/source/libs/qworker/src/qwUtil.c
index 5d81a37156..da69bcf95d 100644
--- a/source/libs/qworker/src/qwUtil.c
+++ b/source/libs/qworker/src/qwUtil.c
@@ -276,7 +276,7 @@ void qwFreeTaskHandle(SQWTaskCtx *ctx, qTaskInfo_t *taskHandle) {
   // Note: free/kill may in RC
   qTaskInfo_t otaskHandle = atomic_load_ptr(taskHandle);
   if (otaskHandle && atomic_val_compare_exchange_ptr(taskHandle, otaskHandle, NULL)) {
-    taosEnableMemoryPoolUsage(gQueryPoolHandle, ctx->memPoolSession);
+    taosEnableMemoryPoolUsage(gQueryMgmt.memPoolHandle, ctx->memPoolSession);
     qDestroyTask(otaskHandle);
     taosDisableMemoryPoolUsage();
 
@@ -320,6 +320,8 @@ void qwFreeTaskCtx(SQWTaskCtx *ctx) {
   }
 
   taosArrayDestroy(ctx->tbInfo);
+
+  taosMemPoolDestroySession(gQueryMgmt.memPoolHandle, ctx->memPoolSession);
 }
 
 static void freeExplainExecItem(void *param) {
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index dc9795023c..a7a2e7f6aa 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -19,6 +19,8 @@ SQWorkerMgmt gQwMgmt = {
 };
 
 TdThreadOnce  gQueryPoolInit = PTHREAD_ONCE_INIT;
+SQueryMgmt gQueryMgmt;
+
 
 int32_t qwStopAllTasks(SQWorker *mgmt) {
   uint64_t qId, tId, sId;
@@ -153,7 +155,7 @@ int32_t qwExecTask(QW_FPARAMS_DEF, SQWTaskCtx *ctx, bool *queryStop) {
     if (taskHandle) {
       qwDbgSimulateSleep();
 
-      taosEnableMemoryPoolUsage(gQueryPoolHandle, ctx->memPoolSession);
+      taosEnableMemoryPoolUsage(gQueryMgmt.memPoolHandle, ctx->memPoolSession);
       code = qExecTaskOpt(taskHandle, pResList, &useconds, &hasMore, &localFetch);
       taosDisableMemoryPoolUsage();
       
@@ -731,8 +733,8 @@ int32_t qwPreprocessQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
   ctx->sId = sId;
   ctx->phase = -1;
   
-  if (NULL != gQueryPoolHandle) {
-    QW_ERR_JRET(taosMemPoolInitSession(gQueryPoolHandle, &ctx->memPoolSession));
+  if (NULL != gQueryMgmt.memPoolHandle) {
+    QW_ERR_JRET(taosMemPoolInitSession(gQueryMgmt.memPoolHandle, &ctx->memPoolSession));
   }
   
   QW_ERR_JRET(qwAddTaskStatus(QW_FPARAMS(), JOB_TASK_STATUS_INIT));
@@ -774,7 +776,7 @@ int32_t qwProcessQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg, char *sql) {
     QW_ERR_JRET(code);
   }
 
-  taosEnableMemoryPoolUsage(gQueryPoolHandle, ctx->memPoolSession);
+  taosEnableMemoryPoolUsage(gQueryMgmt.memPoolHandle, ctx->memPoolSession);
   code = qCreateExecTask(qwMsg->node, mgmt->nodeId, tId, plan, &pTaskInfo, &sinkHandle, qwMsg->msgInfo.compressMsg, sql, OPTR_EXEC_MODEL_BATCH);
   taosDisableMemoryPoolUsage();
   
diff --git a/source/util/inc/tmempoolInt.h b/source/util/inc/tmempoolInt.h
index 9ce6e594e9..d55fc819fd 100755
--- a/source/util/inc/tmempoolInt.h
+++ b/source/util/inc/tmempoolInt.h
@@ -22,6 +22,7 @@ extern "C" {
 
 #include "os.h"
 #include "tlockfree.h"
+#include "thash.h"
 
 #define MP_CHUNK_CACHE_ALLOC_BATCH_SIZE 1000
 #define MP_NSCHUNK_CACHE_ALLOC_BATCH_SIZE 500
@@ -52,12 +53,18 @@ extern "C" {
 #define MP_STAT_FLAG_LOG_SOME_NODE_STAT (1 << 10)
 #define MP_STAT_FLAG_LOG_SOME_POOL_STAT (1 << 11)
 
+#define MP_STAT_FLAG_LOG_ALL            (0xFFFFFFFFFFFFFFFF)
+
+
 // STAT PROCESURE FLAGS
 #define MP_STAT_PROC_FLAG_EXEC (1 << 0)
 #define MP_STAT_PROC_FLAG_INPUT_ERR (1 << 1)
 #define MP_STAT_PROC_FLAG_RES_SUCC (1 << 2)
 #define MP_STAT_PROC_FLAG_RES_FAIL (1 << 3)
 
+// CTRL FUNC FLAGS
+#define MP_CTRL_FLAG_PRINT_STAT (1 << 0)
+
 
 typedef enum EMPStatLogItem {
   E_MP_STAT_LOG_MEM_MALLOC = 1,
@@ -123,23 +130,33 @@ typedef struct SMPStatInput {
 } SMPStatInput;
 
 typedef struct SMPStatItem {
-  int64_t  exec;
   int64_t  inErr;
+  int64_t  exec;
   int64_t  succ;
   int64_t  fail;
-  int64_t  orig;
 } SMPStatItem;
 
+typedef struct SMPStatItemExt {
+  int64_t  inErr;
+  int64_t  exec;
+  int64_t  succ;
+  int64_t  fail;
+  int64_t  origExec;
+  int64_t  origSucc;
+  int64_t  origFail;
+} SMPStatItemExt;
+
 typedef struct SMPMemoryStat {
-  SMPStatItem chunkMalloc;
-  SMPStatItem chunkRecycle;
-  SMPStatItem chunkReUse;
-  SMPStatItem chunkFree;
-  SMPStatItem memMalloc;
-  SMPStatItem memCalloc;
-  SMPStatItem memRealloc;
-  SMPStatItem strdup;
-  SMPStatItem memFree;
+  SMPStatItem    memMalloc;
+  SMPStatItem    memCalloc;
+  SMPStatItemExt memRealloc;
+  SMPStatItem    strdup;
+  SMPStatItem    memFree;
+
+  SMPStatItem    chunkMalloc;
+  SMPStatItem    chunkRecycle;
+  SMPStatItem    chunkReUse;
+  SMPStatItem    chunkFree;
 } SMPMemoryStat;
 
 typedef struct SMPStatDetail {
@@ -152,11 +169,19 @@ typedef struct SMPCtrlInfo {
   int64_t  funcFlags;
 } SMPCtrlInfo;
 
+typedef struct SMPStatSession {
+  int64_t initSucc;
+  int64_t initFail;
+  int64_t destroyNum;
+} SMPStatSession;
+
 typedef struct SMPStatInfo {
-  SMPStatDetail statDetail;
-  SHashObj*     nodeStat;
-  SHashObj*     fileStat;
-  SHashObj*     lineStat;
+  SMPStatDetail  statDetail;
+  SMPStatSession statSession;
+  SHashObj*      sessStat;
+  SHashObj*      nodeStat;
+  SHashObj*      fileStat;
+  SHashObj*      lineStat;
 } SMPStatInfo;
 
 typedef struct SMPSession {
@@ -233,6 +258,13 @@ typedef struct SMemPool {
   SMPStatInfo          stat;
 } SMemPool;
 
+typedef struct SMemPoolMgmt {
+  SArray*       poolList;
+  TdThreadMutex poolMutex;
+  TdThread      poolMgmtThread;
+  int32_t       code;
+} SMemPoolMgmt;
+
 #define MP_GET_FLAG(st, f) ((st) & (f))
 #define MP_SET_FLAG(st, f) (st) |= (f)
 #define MP_CLR_FLAG(st, f) (st) &= (~f)
@@ -242,6 +274,13 @@ enum {
   MP_WRITE,
 };
 
+#define MP_STAT_FORMAT "%s => \tinputError:%" PRId64 "\texec:%" PRId64 "\tsucc:%" PRId64 "\tfail:%" PRId64
+#define MP_STAT_ORIG_FORMAT "%s => \tinputError:%" PRId64 "\texec:%" PRId64 "\tsucc:%" PRId64 "\tfail:%" PRId64 "\torigExec:%" PRId64 "\torigSucc:%" PRId64 "\torigFail:%" PRId64
+
+#define MP_STAT_VALUE(_name, _item) _name, (_item).inErr, (_item).exec, (_item).succ, (_item).fail
+#define MP_STAT_ORIG_VALUE(_name, _item) _name, (_item).inErr, (_item).exec, (_item).succ, (_item).fail, (_item).origExec, (_item).origSucc, (_item).origFail
+
+
 #define MP_INIT_MEM_HEADER(_header, _size, _nsChunk)                      \
   do {                                                                    \
     (_header)->size = _size;                                              \
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index b9edcf8680..bbc44dd12c 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -105,6 +105,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_IP_NOT_IN_WHITE_LIST,         "Not allowed to connec
 TAOS_DEFINE_ERROR(TSDB_CODE_FAILED_TO_CONNECT_S3,         "Failed to connect to s3 server")
 TAOS_DEFINE_ERROR(TSDB_CODE_MSG_PREPROCESSED,             "Message has been processed in preprocess")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_MEM_POOL_PARAM,       "Invalid memory pool input param")
+TAOS_DEFINE_ERROR(TSDB_CODE_SYSTEM_ERROR,                 "Operating system error")
 
 //client
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_OPERATION,        "Invalid operation")
diff --git a/source/util/src/tmempool.c b/source/util/src/tmempool.c
index 3f84747992..04e48e86dc 100644
--- a/source/util/src/tmempool.c
+++ b/source/util/src/tmempool.c
@@ -24,7 +24,7 @@ static TdThreadOnce  gMPoolInit = PTHREAD_ONCE_INIT;
 static TdThreadMutex gMPoolMutex;
 threadlocal void* threadPoolHandle = NULL;
 threadlocal void* threadPoolSession = NULL;
-
+SMemPoolMgmt gMPMgmt;
 
 int32_t memPoolCheckCfg(SMemPoolCfg* cfg) {
   if (cfg->chunkSize < MEMPOOL_MIN_CHUNK_SIZE || cfg->chunkSize > MEMPOOL_MAX_CHUNK_SIZE) {
@@ -153,6 +153,8 @@ int32_t memPoolNewNSChunk(SMemPool* pPool, SMPNSChunk** ppChunk, int64_t chunkSi
   pPool->allocNSChunkNum++;
   pPool->allocNSChunkSize += pPool->cfg.chunkSize;
 
+  *ppChunk = pChunk;
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -204,6 +206,9 @@ int32_t memPoolInit(SMemPool* pPool, char* poolName, SMemPoolCfg* cfg) {
     return TSDB_CODE_INVALID_MEM_POOL_PARAM;
   }
 
+  pPool->ctrlInfo.statFlags = MP_STAT_FLAG_LOG_ALL;
+  pPool->ctrlInfo.funcFlags = MP_CTRL_FLAG_PRINT_STAT;
+
   pPool->threadChunkReserveNum = 1;
   pPool->readyChunkReserveNum = TMIN(cfg->threadNum * pPool->threadChunkReserveNum, pPool->maxChunkNum);
 
@@ -345,6 +350,12 @@ _return:
   return pRes;
 }
 
+int64_t memPoolGetMemorySizeImpl(SMemPool* pPool, SMPSession* pSession, void *ptr) {
+  SMPMemHeader* pHeader = (SMPMemHeader*)ptr - 1;
+
+  return pHeader->size;
+}
+
 void *memPoolMallocImpl(SMemPool* pPool, SMPSession* pSession, int64_t size, uint32_t alignment) {
   int32_t code = TSDB_CODE_SUCCESS;
   void *res = NULL;
@@ -370,6 +381,23 @@ _return:
   return res;
 }
 
+
+void memPoolFreeImpl(SMemPool* pPool, SMPSession* pSession, void *ptr, int64_t* origSize) {
+  if (NULL == ptr) {
+    if (origSize) {
+      *origSize = 0;
+    }
+    
+    return;
+  }
+
+  if (origSize) {
+    *origSize = memPoolGetMemorySizeImpl(pPool, pSession, ptr);
+  }
+  
+  return;
+}
+
 void *memPoolReallocImpl(SMemPool* pPool, SMPSession* pSession, void *ptr, int64_t size, int64_t* origSize) {
   void *res = NULL;
 
@@ -402,104 +430,168 @@ void *memPoolReallocImpl(SMemPool* pPool, SMPSession* pSession, void *ptr, int64
   return res;
 }
 
-
-void memPoolFreeImpl(SMemPool* pPool, SMPSession* pSession, void *ptr, int64_t* origSize) {
-  if (NULL == ptr) {
-    if (origSize) {
-      *origSize = 0;
-    }
-    
+void memPoolPrintStatDetail(SMPCtrlInfo* pCtrl, SMPStatDetail* pDetail, char* detailName) {
+  if (!MP_GET_FLAG(pCtrl->funcFlags, MP_CTRL_FLAG_PRINT_STAT)) {
     return;
   }
 
-  if (origSize) {
-    *origSize = memPoolGetMemorySizeImpl(pPool, pSession, ptr);
-  }
+  uInfo("MemPool [%s] stat detail:", detailName);
   
-  return;
+  uInfo("[times]:");
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memMalloc", pDetail->times.memMalloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memCalloc", pDetail->times.memCalloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memRealloc", pDetail->times.memRealloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memStrdup", pDetail->times.strdup));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memFree", pDetail->times.memFree));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkMalloc", pDetail->times.chunkMalloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkRecycle", pDetail->times.chunkRecycle));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkReUse", pDetail->times.chunkReUse));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkFree", pDetail->times.chunkFree));
+
+  uInfo("[bytes]:");
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memMalloc", pDetail->bytes.memMalloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memCalloc", pDetail->bytes.memCalloc));
+  uInfo(MP_STAT_ORIG_FORMAT, MP_STAT_ORIG_VALUE("memRealloc", pDetail->bytes.memRealloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memStrdup", pDetail->bytes.strdup));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("memFree", pDetail->bytes.memFree));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkMalloc", pDetail->bytes.chunkMalloc));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkRecycle", pDetail->bytes.chunkRecycle));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkReUse", pDetail->bytes.chunkReUse));
+  uInfo(MP_STAT_FORMAT, MP_STAT_VALUE("chunkFree", pDetail->bytes.chunkFree));
+
 }
 
-int64_t memPoolGetMemorySizeImpl(SMemPool* pPool, SMPSession* pSession, void *ptr) {
-  SMPMemHeader* pHeader = (SMPMemHeader*)ptr - 1;
-
-  return pHeader->size;
+void memPoolPrintFileLineStat(SMPCtrlInfo* pCtrl, SHashObj* pHash, char* detailName) {
+  //TODO
 }
 
+void memPoolPrintNodeStat(SMPCtrlInfo* pCtrl, SHashObj* pHash, char* detailName) {
+  //TODO
+}
+
+void memPoolPrintSessionStat(SMPCtrlInfo* pCtrl, SMPStatSession* pSessStat, char* detailName) {
+  if (!MP_GET_FLAG(pCtrl->funcFlags, MP_CTRL_FLAG_PRINT_STAT)) {
+    return;
+  }
+
+  uInfo("MemPool [%s] session stat:", detailName);
+  uInfo("init session succeed num: %" PRId64, pSessStat->initSucc);
+  uInfo("init session failed num: %" PRId64, pSessStat->initFail);
+  uInfo("session destroyed num: %" PRId64, pSessStat->destroyNum);
+}
+
+void memPoolPrintStat(SMemPool* pPool, SMPSession* pSession, char* procName) {
+  char detailName[128];
+
+  if (NULL != pSession) {
+    snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "Session");
+    detailName[sizeof(detailName) - 1] = 0;
+    memPoolPrintStatDetail(&pSession->ctrlInfo, &pSession->stat.statDetail, detailName);
+
+    snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "SessionFile");
+    detailName[sizeof(detailName) - 1] = 0;
+    memPoolPrintFileLineStat(&pSession->ctrlInfo, pSession->stat.fileStat, detailName);
+
+    snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "SessionFileLine");
+    detailName[sizeof(detailName) - 1] = 0;
+    memPoolPrintFileLineStat(&pSession->ctrlInfo, pSession->stat.lineStat, detailName);
+  }
+
+  snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, pPool->name);
+  detailName[sizeof(detailName) - 1] = 0;
+  memPoolPrintSessionStat(&pPool->ctrlInfo, &pPool->stat.statSession, detailName);
+  memPoolPrintStatDetail(&pPool->ctrlInfo, &pPool->stat.statDetail, detailName);
+
+  snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "MemPoolNode");
+  detailName[sizeof(detailName) - 1] = 0;
+  memPoolPrintNodeStat(&pSession->ctrlInfo, pSession->stat.nodeStat, detailName);
+  
+  snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "MemPoolFile");
+  detailName[sizeof(detailName) - 1] = 0;
+  memPoolPrintFileLineStat(&pSession->ctrlInfo, pSession->stat.fileStat, detailName);
+  
+  snprintf(detailName, sizeof(detailName) - 1, "%s - %s", procName, "MemPoolFileLine");
+  detailName[sizeof(detailName) - 1] = 0;
+  memPoolPrintFileLineStat(&pSession->ctrlInfo, pSession->stat.lineStat, detailName);
+}
 
 void memPoolLogStatDetail(SMPStatDetail* pDetail, EMPStatLogItem item, SMPStatInput* pInput) {
   switch (item) {
     case E_MP_STAT_LOG_MEM_MALLOC: {
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_EXEC)) {
         atomic_add_fetch_64(&pDetail->times.memMalloc.exec, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memMalloc.exec, size);
+        atomic_add_fetch_64(&pDetail->bytes.memMalloc.exec, pInput->size);
       }
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_SUCC)) {
         atomic_add_fetch_64(&pDetail->times.memMalloc.succ, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memMalloc.succ, size);
+        atomic_add_fetch_64(&pDetail->bytes.memMalloc.succ, pInput->size);
       } 
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_FAIL)) {
         atomic_add_fetch_64(&pDetail->times.memMalloc.fail, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memMalloc.fail, size);
+        atomic_add_fetch_64(&pDetail->bytes.memMalloc.fail, pInput->size);
       } 
       break;
     }
     case E_MP_STAT_LOG_MEM_CALLOC:{
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_EXEC)) {
         atomic_add_fetch_64(&pDetail->times.memCalloc.exec, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memCalloc.exec, size);
+        atomic_add_fetch_64(&pDetail->bytes.memCalloc.exec, pInput->size);
       }
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_SUCC)) {
         atomic_add_fetch_64(&pDetail->times.memCalloc.succ, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memCalloc.succ, size);
+        atomic_add_fetch_64(&pDetail->bytes.memCalloc.succ, pInput->size);
       } 
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_FAIL)) {
         atomic_add_fetch_64(&pDetail->times.memCalloc.fail, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memCalloc.fail, size);
+        atomic_add_fetch_64(&pDetail->bytes.memCalloc.fail, pInput->size);
       } 
       break;
     }
     case E_MP_STAT_LOG_MEM_REALLOC:{
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_EXEC)) {
         atomic_add_fetch_64(&pDetail->times.memRealloc.exec, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memRealloc.exec, size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.exec, pInput->size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.origExec, pInput->origSize);
       }
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_SUCC)) {
         atomic_add_fetch_64(&pDetail->times.memRealloc.succ, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memRealloc.succ, size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.succ, pInput->size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.origSucc, pInput->origSize);
       } 
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_FAIL)) {
         atomic_add_fetch_64(&pDetail->times.memRealloc.fail, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memRealloc.fail, size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.fail, pInput->size);
+        atomic_add_fetch_64(&pDetail->bytes.memRealloc.origFail, pInput->origSize);
       } 
       break;
     }
     case E_MP_STAT_LOG_MEM_FREE:{
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_EXEC)) {
         atomic_add_fetch_64(&pDetail->times.memFree.exec, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memFree.exec, size);
+        atomic_add_fetch_64(&pDetail->bytes.memFree.exec, pInput->size);
       }
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_SUCC)) {
         atomic_add_fetch_64(&pDetail->times.memFree.succ, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memFree.succ, size);
+        atomic_add_fetch_64(&pDetail->bytes.memFree.succ, pInput->size);
       } 
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_FAIL)) {
         atomic_add_fetch_64(&pDetail->times.memFree.fail, 1);
-        atomic_add_fetch_64(&pDetail->bytes.memFree.fail, size);
+        atomic_add_fetch_64(&pDetail->bytes.memFree.fail, pInput->size);
       } 
       break;
     }
     case E_MP_STAT_LOG_MEM_STRDUP: {
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_EXEC)) {
         atomic_add_fetch_64(&pDetail->times.strdup.exec, 1);
-        atomic_add_fetch_64(&pDetail->bytes.strdup.exec, size);
+        atomic_add_fetch_64(&pDetail->bytes.strdup.exec, pInput->size);
       }
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_SUCC)) {
         atomic_add_fetch_64(&pDetail->times.strdup.succ, 1);
-        atomic_add_fetch_64(&pDetail->bytes.strdup.succ, size);
+        atomic_add_fetch_64(&pDetail->bytes.strdup.succ, pInput->size);
       } 
       if (MP_GET_FLAG(pInput->procFlags, MP_STAT_PROC_FLAG_RES_FAIL)) {
         atomic_add_fetch_64(&pDetail->times.strdup.fail, 1);
-        atomic_add_fetch_64(&pDetail->bytes.strdup.fail, size);
+        atomic_add_fetch_64(&pDetail->bytes.strdup.fail, pInput->size);
       } 
       break;
     }
@@ -544,11 +636,29 @@ void memPoolLogStat(SMemPool* pPool, SMPSession* pSession, EMPStatLogItem item,
   }
 }
 
+void* memPoolMgmtThreadFunc(void* param) {
+
+}
 
 void taosMemPoolModInit(void) {
-  taosThreadMutexInit(&gMPoolMutex, NULL);
+  taosThreadMutexInit(&gMPMgmt.poolMutex, NULL);
 
-  gMPoolList = taosArrayInit(10, POINTER_BYTES);
+  gMPMgmt.poolList = taosArrayInit(10, POINTER_BYTES);
+  if (NULL == gMPMgmt.poolList) {
+    gMPMgmt.code = TSDB_CODE_OUT_OF_MEMORY;
+    return;
+  }
+  
+  TdThreadAttr thAttr;
+  taosThreadAttrInit(&thAttr);
+  taosThreadAttrSetDetachState(&thAttr, PTHREAD_CREATE_JOINABLE);
+  if (taosThreadCreate(&gMPMgmt.poolMgmtThread, &thAttr, memPoolMgmtThreadFunc, NULL) != 0) {
+    uError("failed to create memPool mgmt thread since %s", strerror(errno));
+    gMPMgmt.code = TSDB_CODE_SYSTEM_ERROR;
+    return;
+  }
+
+  taosThreadAttrDestroy(&thAttr);
 }
 
 int32_t taosMemPoolOpen(char* poolName, SMemPoolCfg* cfg, void** poolHandle) {
@@ -588,9 +698,14 @@ _return:
   return code;
 }
 
-void taosMemPoolDestroySession(void* session) {
+void taosMemPoolDestroySession(void* poolHandle, void* session) {
+  SMemPool* pPool = (SMemPool*)poolHandle;
   SMPSession* pSession = (SMPSession*)session;
   //TODO;
+
+  memPoolPrintStat(pPool, pSession, "DestroySession");
+
+  atomic_add_fetch_64(&pPool->stat.statSession.destroyNum, 1);
 }
 
 int32_t taosMemPoolInitSession(void* poolHandle, void** ppSession) {
@@ -601,6 +716,8 @@ int32_t taosMemPoolInitSession(void* poolHandle, void** ppSession) {
 
   MP_ERR_JRET(memPoolGetIdleNode(pPool, &pPool->sessionCache, (void**)&pSession));
 
+  memcpy(&pSession->ctrlInfo, &pPool->ctrlInfo, sizeof(pSession->ctrlInfo));
+
   MP_ERR_JRET(memPoolGetChunk(pPool, &pChunk));
 
   pSession->allocChunkNum = 1;
@@ -612,8 +729,11 @@ int32_t taosMemPoolInitSession(void* poolHandle, void** ppSession) {
 _return:
 
   if (TSDB_CODE_SUCCESS != code) {
-    taosMemPoolDestroySession(pSession);
+    taosMemPoolDestroySession(poolHandle, pSession);
     pSession = NULL;
+    atomic_add_fetch_64(&pPool->stat.statSession.initFail, 1);
+  } else {
+    atomic_add_fetch_64(&pPool->stat.statSession.initSucc, 1);
   }
 
   *ppSession = pSession;