diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index df1a622101afa032001ed499495656186b40754f..3f96466cc00fc3250860e79bc3dd85e6fd0368d7 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -163,6 +163,7 @@ extern float   tsTotalDataDirGB;
 extern float   tsAvailLogDirGB;
 extern float   tsAvailTmpDirectorySpace;
 extern float   tsAvailDataDirGB;
+extern float   tsUsedDataDirGB;
 extern float   tsMinimalLogDirGB;
 extern float   tsReservedTmpDirectorySpace;
 extern float   tsMinimalDataDirGB;
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 9e405fdfe115e36cf0a1d64143a30ea9f19b1373..4a5df9361b7a9bb8d6fe852db273f53cab6bf879 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -210,6 +210,7 @@ float   tsTotalTmpDirGB = 0;
 float   tsTotalDataDirGB = 0;
 float   tsAvailTmpDirectorySpace = 0;
 float   tsAvailDataDirGB = 0;
+float   tsUsedDataDirGB = 0;
 float   tsReservedTmpDirectorySpace = 1.0f;
 float   tsMinimalDataDirGB = 1.0f;
 int32_t tsTotalMemoryMB = 0;
diff --git a/src/inc/tfs.h b/src/inc/tfs.h
index 76e9b17a621f9842479396ada65bb10ac147366c..4ed21bc6e1ddb4d9011d701ad99e6f2a71f54b0e 100644
--- a/src/inc/tfs.h
+++ b/src/inc/tfs.h
@@ -35,6 +35,7 @@ typedef struct {
 // FS APIs ====================================
 typedef struct {
   int64_t tsize;
+  int64_t used;
   int64_t avail;
 } SFSMeta;
 
@@ -90,4 +91,4 @@ void         tfsClosedir(TDIR *tdir);
 }
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/os/inc/osSysinfo.h b/src/os/inc/osSysinfo.h
index 25c9c97b1e888d9f4371eea67a16efea728294a4..895b5dd499196703f954c5621241cd2d1e2fabec 100644
--- a/src/os/inc/osSysinfo.h
+++ b/src/os/inc/osSysinfo.h
@@ -23,6 +23,7 @@ extern "C" {
 // TAOS_OS_FUNC_SYSINFO
 typedef struct {
   int64_t tsize;
+  int64_t used;
   int64_t avail;
 } SysDiskSize;
 
diff --git a/src/os/src/darwin/darwinSysInfo.c b/src/os/src/darwin/darwinSysInfo.c
index 6af6285f56aa33200379aa52f94e0ab39de80644..55c07766b307f57fbc8fd76798ac880efef8a4de 100644
--- a/src/os/src/darwin/darwinSysInfo.c
+++ b/src/os/src/darwin/darwinSysInfo.c
@@ -138,6 +138,8 @@ void taosPrintOsInfo() {
   // uInfo(" os streamMax:           %" PRId64, tsStreamMax);
   uInfo(" os numOfCores:          %d", tsNumOfCores);
   uInfo(" os totalDisk:           %f(GB)", tsTotalDataDirGB);
+  uInfo(" os usedDisk:            %f(GB)", tsUsedDataDirGB);
+  uInfo(" os availDisk:           %f(GB)", tsAvailDataDirGB);
   uInfo(" os totalMemory:         %d(MB)", tsTotalMemoryMB);
 
   struct utsname buf;
@@ -222,6 +224,7 @@ int32_t taosGetDiskSize(char *dataDir, SysDiskSize *diskSize) {
   } else {
     diskSize->tsize = info.f_blocks * info.f_frsize;
     diskSize->avail = info.f_bavail * info.f_frsize;
+    diskSize->used = (info.f_blocks - info.f_bfree) * info.f_frsize;
     return 0;
   }
 }
diff --git a/src/os/src/detail/osSysinfo.c b/src/os/src/detail/osSysinfo.c
index f12ec93bf7725d013fa2f53d148de783e854d3bf..c0d46878a821db3490ccf54f8e303e37e52f84aa 100644
--- a/src/os/src/detail/osSysinfo.c
+++ b/src/os/src/detail/osSysinfo.c
@@ -326,6 +326,7 @@ int32_t taosGetDiskSize(char *dataDir, SysDiskSize *diskSize) {
   } else {
     diskSize->tsize = info.f_blocks * info.f_frsize;
     diskSize->avail = info.f_bavail * info.f_frsize;
+    diskSize->used = (info.f_blocks - info.f_bfree) * info.f_frsize;
     return 0;
   }
 }
@@ -506,6 +507,8 @@ void taosPrintOsInfo() {
   uInfo(" os streamMax:           %" PRId64, tsStreamMax);
   uInfo(" os numOfCores:          %d", tsNumOfCores);
   uInfo(" os totalDisk:           %f(GB)", tsTotalDataDirGB);
+  uInfo(" os usedDisk:            %f(GB)", tsUsedDataDirGB);
+  uInfo(" os availDisk:           %f(GB)", tsAvailDataDirGB);
   uInfo(" os totalMemory:         %d(MB)", tsTotalMemoryMB);
 
   struct utsname buf;
diff --git a/src/os/src/windows/wSysinfo.c b/src/os/src/windows/wSysinfo.c
index 48fb3c13a8fe80332cfc26f893d6a21f1cdd902e..8a81e3079a17e013372ebd7de0facb6b49a99c7b 100644
--- a/src/os/src/windows/wSysinfo.c
+++ b/src/os/src/windows/wSysinfo.c
@@ -136,7 +136,8 @@ int32_t taosGetDiskSize(char *dataDir, SysDiskSize *diskSize) {
                                      (PULARGE_INTEGER)&i64FreeBytes);
   if (fResult) {
     diskSize->tsize = (int64_t)(i64TotalBytes);
-    diskSize->avail = (int64_t)(i64FreeBytes);
+    diskSize->avail = (int64_t)(i64FreeBytesToCaller);
+    diskSize->used = (int64_t)(i64TotalBytes - i64FreeBytes);
     return 0;
   } else {
     uError("failed to get disk size, dataDir:%s errno:%s", tsDataDir, strerror(errno));
@@ -205,6 +206,8 @@ void taosGetSystemInfo() {
 void taosPrintOsInfo() {
   uInfo(" os numOfCores:          %d", tsNumOfCores);
   uInfo(" os totalDisk:           %f(GB)", tsTotalDataDirGB);
+  uInfo(" os usedDisk:            %f(GB)", tsUsedDataDirGB);
+  uInfo(" os availDisk:           %f(GB)", tsAvailDataDirGB);
   uInfo(" os totalMemory:         %d(MB)", tsTotalMemoryMB);
   uInfo("==================================");
 }
diff --git a/src/plugins/monitor/src/monMain.c b/src/plugins/monitor/src/monMain.c
index ac80ad62509a755b5b86b65593a90a2730120df8..94af8e3ecd6623f791f6ad797176a59ca2605c2b 100644
--- a/src/plugins/monitor/src/monMain.c
+++ b/src/plugins/monitor/src/monMain.c
@@ -292,7 +292,7 @@ static int32_t monBuildCpuSql(char *sql) {
 
 // unit is GB
 static int32_t monBuildDiskSql(char *sql) {
-  return sprintf(sql, ", %f, %d", (tsTotalDataDirGB - tsAvailDataDirGB), (int32_t)tsTotalDataDirGB);
+  return sprintf(sql, ", %f, %d", tsUsedDataDirGB, (int32_t)tsTotalDataDirGB);
 }
 
 // unit is Kb
diff --git a/src/tfs/inc/tfsint.h b/src/tfs/inc/tfsint.h
index fa4cd597237a957064e1cca74fe089051db450c6..619ef6df73444934a949955af41c85f359660116 100644
--- a/src/tfs/inc/tfsint.h
+++ b/src/tfs/inc/tfsint.h
@@ -41,6 +41,7 @@ extern int fsDebugFlag;
 // tdisk.c ======================================================
 typedef struct {
   int64_t size;
+  int64_t used;
   int64_t free;
 } SDiskMeta;
 
@@ -56,6 +57,7 @@ typedef struct SDisk {
 #define DISK_DIR(pd) ((pd)->dir)
 #define DISK_META(pd) ((pd)->dmeta)
 #define DISK_SIZE(pd) ((pd)->dmeta.size)
+#define DISK_USED_SIZE(pd) ((pd)->dmeta.used)
 #define DISK_FREE_SIZE(pd) ((pd)->dmeta.free)
 
 SDisk *tfsNewDisk(int level, int id, const char *dir);
@@ -65,6 +67,7 @@ int    tfsUpdateDiskInfo(SDisk *pDisk);
 // ttier.c ======================================================
 typedef struct {
   int64_t size;
+  int64_t used;
   int64_t free;
   int16_t nAvailDisks;  // # of Available disks
 } STierMeta;
@@ -96,4 +99,4 @@ void   tfsPosNextId(STier *pTier);
 }
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/tfs/src/tdisk.c b/src/tfs/src/tdisk.c
index 37798d3a886b443a20703747ad9a99e26c1502b7..28c836e5d95e8c19b47689dd39734be5acaf7b95 100644
--- a/src/tfs/src/tdisk.c
+++ b/src/tfs/src/tdisk.c
@@ -52,6 +52,7 @@ int tfsUpdateDiskInfo(SDisk *pDisk) {
   }
 
   pDisk->dmeta.size = diskSize.tsize;
+  pDisk->dmeta.used = diskSize.used;
   pDisk->dmeta.free = diskSize.avail;
 
   return code;
diff --git a/src/tfs/src/tfs.c b/src/tfs/src/tfs.c
index 7b7c9b6127db0f1c8cabab35254ba4a128e05f05..63fc090f006fbb0fcd629e5692285f7ca785c23e 100644
--- a/src/tfs/src/tfs.c
+++ b/src/tfs/src/tfs.c
@@ -134,6 +134,7 @@ void tfsUpdateInfo(SFSMeta *pFSMeta) {
     tfsUpdateTierInfo(pTier, &tierMeta);
     pFSMeta->tsize += tierMeta.size;
     pFSMeta->avail += tierMeta.free;
+    pFSMeta->used += tierMeta.used;
   }
 
   tfsLock();
@@ -585,6 +586,7 @@ void taosGetDisk() {
   if (tscEmbedded) {
     tfsUpdateInfo(&fsMeta);
     tsTotalDataDirGB = (float)(fsMeta.tsize / unit);
+    tsUsedDataDirGB = (float)(fsMeta.used / unit);
     tsAvailDataDirGB = (float)(fsMeta.avail / unit);
   }
 
diff --git a/src/tfs/src/ttier.c b/src/tfs/src/ttier.c
index 2dce0c31949a145bdafd111a63e96c2b83a7140c..3b19797acf67f36a31c30dccefc0c985512f510b 100644
--- a/src/tfs/src/ttier.c
+++ b/src/tfs/src/ttier.c
@@ -100,6 +100,7 @@ void tfsUpdateTierInfo(STier *pTier, STierMeta *pTierMeta) {
       continue;
     }
     pTierMeta->size += DISK_SIZE(DISK_AT_TIER(pTier, id));
+    pTierMeta->used += DISK_USED_SIZE(DISK_AT_TIER(pTier, id));
     pTierMeta->free += DISK_FREE_SIZE(DISK_AT_TIER(pTier, id));
     pTierMeta->nAvailDisks++;
   }
@@ -166,4 +167,4 @@ void tfsPosNextId(STier *pTier) {
   }
 
   pTier->nextid = nextid;
-}
\ No newline at end of file
+}