diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index c53e771f42b9523edc3920b9a84f53f2f6bb123c..dfd0b680399d8656a3e5a8d164b32ba1d0e1d3e6 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -19,7 +19,7 @@
 #include "tlog.h"
 #include "tname.h"
 
-#define MALLOC_ALIGN_BYTES  32
+#define MALLOC_ALIGN_BYTES  256
 
 int32_t colDataGetLength(const SColumnInfoData* pColumnInfoData, int32_t numOfRows) {
   ASSERT(pColumnInfoData != NULL);
@@ -1191,7 +1191,6 @@ static int32_t doEnsureCapacity(SColumnInfoData* pColumn, const SDataBlockInfo*
     int32_t oldLen = BitmapLen(existedRows);
     pColumn->nullbitmap = tmp;
     memset(&pColumn->nullbitmap[oldLen], 0, BitmapLen(numOfRows) - oldLen);
-
     ASSERT(pColumn->info.bytes);
 
     // make sure the allocated memory is MALLOC_ALIGN_BYTES aligned
@@ -1207,6 +1206,12 @@ static int32_t doEnsureCapacity(SColumnInfoData* pColumn, const SDataBlockInfo*
     }
 
     pColumn->pData = tmp;
+
+    // todo remove it soon
+#if defined LINUX
+    ASSERT((((uint64_t)pColumn->pData) & (MALLOC_ALIGN_BYTES - 1)) == 0x0);
+#endif
+
     if (clearPayload) {
       memset(tmp + pColumn->info.bytes * existedRows, 0, pColumn->info.bytes * (numOfRows - existedRows));
     }
diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index 93c43725867cb41835c98be67e49ed73b4af37aa..2032cb9fce1a533af161a5715cca0e165ce1dda9 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -129,6 +129,7 @@ void initGroupedResultInfo(SGroupResInfo* pGroupResInfo, SSHashObj* pHashmap, in
   void* pData = NULL;
   pGroupResInfo->pRows = taosArrayInit(10, POINTER_BYTES);
 
+  // todo avoid repeated malloc memory
   size_t  keyLen = 0;
   int32_t iter = 0;
   while ((pData = tSimpleHashIterate(pHashmap, pData, &iter)) != NULL) {
diff --git a/source/libs/scalar/src/scalar.c b/source/libs/scalar/src/scalar.c
index 2bb38c16789b996a693016a7a692fb4653f4b5bb..e3436c83c1f50739d83295ace1deab49ccfca4c2 100644
--- a/source/libs/scalar/src/scalar.c
+++ b/source/libs/scalar/src/scalar.c
@@ -165,10 +165,7 @@ int32_t scalarGenerateSetFromList(void **data, void *pNode, uint32_t type) {
       SCL_ERR_JRET(TSDB_CODE_OUT_OF_MEMORY);
     }
 
-    colDataDestroy(out.columnData);
-    taosMemoryFreeClear(out.columnData);
-    out.columnData = taosMemoryCalloc(1, sizeof(SColumnInfoData));
-
+    colInfoDataCleanup(out.columnData, out.numOfRows);
     cell = cell->pNext;
   }
 
diff --git a/source/os/src/osMemory.c b/source/os/src/osMemory.c
index 2f30e8977afbfa6d691fed2cc8ab2c5b62752093..230ca5b9683dc26bdcd443235d7e329f489d3d35 100644
--- a/source/os/src/osMemory.c
+++ b/source/os/src/osMemory.c
@@ -351,7 +351,8 @@ void* taosMemoryMallocAlign(uint32_t alignment, int64_t size) {
   ASSERT(0);
 #else
 #if defined(LINUX)
-  return memalign(alignment, size);
+  void* p = memalign(alignment, size);
+  return p;
 #else
   return taosMemoryMalloc(size);
 #endif
diff --git a/source/util/src/tpagedbuf.c b/source/util/src/tpagedbuf.c
index 0f4c51060bc1454fdef697255fa3174666c4c53b..37874ae250264dfe69a1669878fbe33ab9683e6d 100644
--- a/source/util/src/tpagedbuf.c
+++ b/source/util/src/tpagedbuf.c
@@ -30,6 +30,7 @@ struct SDiskbasedBuf {
   TdFilePtr pFile;
   int32_t   allocateId;  // allocated page id
   char*     path;        // file path
+  char*     prefix;      // file name prefix
   int32_t   pageSize;    // current used page size
   int32_t   inMemPages;  // numOfPages that are allocated in memory
   SList*    freePgList;  // free page list
@@ -48,6 +49,12 @@ struct SDiskbasedBuf {
 };
 
 static int32_t createDiskFile(SDiskbasedBuf* pBuf) {
+  if (pBuf->path == NULL) { // prepare the file name when needed it
+    char path[PATH_MAX] = {0};
+    taosGetTmpfilePath(pBuf->prefix, "paged-buf", path);
+    pBuf->path = taosMemoryStrDup(path);
+  }
+
   pBuf->pFile =
       taosOpenFile(pBuf->path, TD_FILE_CREATE | TD_FILE_WRITE | TD_FILE_READ | TD_FILE_TRUNC | TD_FILE_AUTO_DEL);
   if (pBuf->pFile == NULL) {
@@ -356,10 +363,7 @@ int32_t createDiskbasedBuf(SDiskbasedBuf** pBuf, int32_t pagesize, int32_t inMem
 
   pPBuf->assistBuf = taosMemoryMalloc(pPBuf->pageSize + 2);  // EXTRA BYTES
   pPBuf->all = taosHashInit(10, fn, true, false);
-
-  char path[PATH_MAX] = {0};
-  taosGetTmpfilePath(dir, "paged-buf", path);
-  pPBuf->path = strdup(path);
+  pPBuf->prefix = (char*) dir;
 
   pPBuf->emptyDummyIdList = taosArrayInit(1, sizeof(int32_t));