diff --git a/src/client/src/tscLocal.c b/src/client/src/tscLocal.c
index 600ef8834407360a814767a0633720327fcd697c..5ae226a577a9af982c7c0d926eb432d5e7e73ac4 100644
--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -156,7 +156,8 @@ static int32_t tscSetValueToResObj(SSqlObj *pSql, int32_t rowLen) {
     pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, 3);
     if (i >= tscGetNumOfColumns(pMeta) && tscGetNumOfTags(pMeta) != 0) {
       char* output = pRes->data + tscFieldInfoGetOffset(pQueryInfo, 3) * totalNumOfRows + pField->bytes * i;
-      STR_WITH_SIZE_TO_VARSTR(output, "TAG", 3);
+      const char *src = "TAG";
+      STR_WITH_SIZE_TO_VARSTR(output, src, strlen(src));
     }
   }
 
@@ -191,7 +192,8 @@ static int32_t tscSetValueToResObj(SSqlObj *pSql, int32_t rowLen) {
     // tag value
     pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, 3);
     char *target = pRes->data + tscFieldInfoGetOffset(pQueryInfo, 3) * totalNumOfRows + pField->bytes * i;
-    STR_WITH_SIZE_TO_VARSTR(target, "TAG", 3);
+    const char *src = "TAG";
+    STR_WITH_SIZE_TO_VARSTR(target, src, strlen(src));
 
     pTagValue += pSchema[i].bytes;
   }
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 12032725c388bb5fedd72347d6cd1fa4feaf8831..b33220fb81c628ec6d9c5919a28241b2b64cdb20 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -2222,14 +2222,14 @@ int32_t setKillInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   char* portStr = strtok(NULL, &delim);
 
   if (!validateIpAddress(ipStr, strlen(ipStr))) {
-    memset(pCmd->payload, 0, tListLen(pCmd->payload));
+    memset(pCmd->payload, 0, strlen(pCmd->payload));
 
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
   }
 
   uint16_t port = (uint16_t)strtol(portStr, NULL, 10);
   if (port <= 0 || port > 65535) {
-    memset(pCmd->payload, 0, tListLen(pCmd->payload));
+    memset(pCmd->payload, 0, strlen(pCmd->payload));
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
   }
 
diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 937c8d177dc73138e626f83b18657cbb8eb485a2..33b76cea2deaa8b54d844b0002fbf648d1822599 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -634,7 +634,7 @@ void *readMetric(void *sarg) {
   fprintf(fp, "Querying On %d records:\n", totalData);
 
   for (int j = 0; j < n; j++) {
-    char condition[BUFFER_SIZE] = "\0";
+    char condition[BUFFER_SIZE - 30] = "\0";
     char tempS[BUFFER_SIZE] = "\0";
 
     int m = 10 < num_of_tables ? 10 : num_of_tables;
diff --git a/src/mnode/src/mgmtDb.c b/src/mnode/src/mgmtDb.c
index 9eb8b8dce197b603d6f73b0b9c04afbae2392e44..4fd3df17757932c0fe958305b17455e4dd664ac9 100644
--- a/src/mnode/src/mgmtDb.c
+++ b/src/mnode/src/mgmtDb.c
@@ -677,9 +677,11 @@ static int32_t mgmtRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void *
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
     if (pDb->status == TSDB_DB_STATUS_READY) {
-      STR_WITH_SIZE_TO_VARSTR(pWrite, "ready", 5);
+      const char *src = "ready";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
     } else {
-      STR_WITH_SIZE_TO_VARSTR(pWrite, "dropping", 8);
+      const char *src = "dropping";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
     }
     cols++;
 
diff --git a/src/mnode/src/mgmtDnode.c b/src/mnode/src/mgmtDnode.c
index bb98e1c3e6d8ef43fa0bc3ace647b70f6dd02f83..9bb48b7e9520219ffcd1c3f6666cc4e0cfb566fa 100644
--- a/src/mnode/src/mgmtDnode.c
+++ b/src/mnode/src/mgmtDnode.c
@@ -225,7 +225,7 @@ void mgmtProcessCfgDnodeMsg(SQueuedMsg *pMsg) {
   if (pCmCfgDnode->ep[0] == 0) {
     strcpy(pCmCfgDnode->ep, tsLocalEp);
   } else {
-    strcpy(pCmCfgDnode->ep, pCmCfgDnode->ep);
+    // TODO temporary disabled for compiling: strcpy(pCmCfgDnode->ep, pCmCfgDnode->ep); 
   }
 
   if (strcmp(pMsg->pUser->user, "root") != 0) {
diff --git a/src/mnode/src/mgmtUser.c b/src/mnode/src/mgmtUser.c
index b4dd58cb3b5d7a9c41766de2c039c7f09ea4d39a..1dd572ed9d879e1a399214af3942e01610cef45e 100644
--- a/src/mnode/src/mgmtUser.c
+++ b/src/mnode/src/mgmtUser.c
@@ -309,11 +309,14 @@ static int32_t mgmtRetrieveUsers(SShowObj *pShow, char *data, int32_t rows, void
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
     if (pUser->superAuth) {
-      STR_WITH_SIZE_TO_VARSTR(pWrite, "super", 5);
+      const char *src = "super";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
     } else if (pUser->writeAuth) {
-      STR_WITH_SIZE_TO_VARSTR(pWrite, "writable", 8);
+      const char *src = "writable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
     } else {
-      STR_WITH_SIZE_TO_VARSTR(pWrite, "readable", 8);
+      const char *src = "readable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
     }
     cols++;
 
@@ -525,4 +528,4 @@ void  mgmtDropAllUsers(SAcctObj *pAcct)  {
   }
 
   mTrace("acct:%s, all users:%d is dropped from sdb", pAcct->user, numOfUsers);
-}
\ No newline at end of file
+}
diff --git a/src/mnode/src/mgmtVgroup.c b/src/mnode/src/mgmtVgroup.c
index f83268e760ab85e07c22249bff28db6430e598c5..e6fad58b71238518f6bf81bbeaa59a996f2e07e2 100644
--- a/src/mnode/src/mgmtVgroup.c
+++ b/src/mnode/src/mgmtVgroup.c
@@ -495,11 +495,12 @@ int32_t mgmtRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pCo
         cols++;
       } else {
         pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        STR_WITH_SIZE_TO_VARSTR(pWrite, "NULL", 4);
+        const char *src = "NULL";
+        STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
         cols++;
         
         pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        STR_WITH_SIZE_TO_VARSTR(pWrite, "NULL", 4);
+        STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
         cols++;
       }
     }
diff --git a/src/os/linux/CMakeLists.txt b/src/os/linux/CMakeLists.txt
index 83d717f905fb4cfa40ba357c46c6740ba1f3f636..7be4a13f255d0e72b3ad7462edb5424cdf3762ec 100644
--- a/src/os/linux/CMakeLists.txt
+++ b/src/os/linux/CMakeLists.txt
@@ -12,3 +12,5 @@ IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
   ADD_LIBRARY(os ${SRC})
   TARGET_LINK_LIBRARIES(os m rt)
 ENDIF ()
+
+SET_SOURCE_FILES_PROPERTIES(src/linuxSysPara.c PROPERTIES COMPILE_FLAGS -w)
diff --git a/src/os/linux/inc/os.h b/src/os/linux/inc/os.h
index 27a8363050a2519248ce515e94185c4a623c0d55..cab899753d654912bc10817d4114bcc931760ddd 100644
--- a/src/os/linux/inc/os.h
+++ b/src/os/linux/inc/os.h
@@ -23,13 +23,6 @@ extern "C" {
 #include <stdio.h>
 #include <stdlib.h>
 
-#ifndef _ALPINE
-  #include <error.h>
-  #include <sys/sysctl.h>
-#else
-  #include <linux/sysctl.h>  
-#endif
-
 #include <argp.h>
 #include <arpa/inet.h>
 #include <assert.h>
@@ -82,6 +75,7 @@ extern "C" {
 #include <fcntl.h>
 #include <sys/utsname.h>
 #include <sys/resource.h>
+#include <error.h>
 
 #define taosCloseSocket(x) \
   {                        \
diff --git a/src/os/linux/inc/tsysctl.h b/src/os/linux/inc/tsysctl.h
new file mode 100644
index 0000000000000000000000000000000000000000..559d5653ee5f1083595d299c7dc61a99a0a35b46
--- /dev/null
+++ b/src/os/linux/inc/tsysctl.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TDENGINE_TSYSCTL_H
+#define TDENGINE_TSYSCTL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _ALPINE
+  #include <error.h>
+  #include <sys/sysctl.h>
+#else
+  #include <linux/sysctl.h>  
+#endif
+
+#endif
diff --git a/src/os/linux/src/linuxSysPara.c b/src/os/linux/src/linuxSysPara.c
index f43ed44a4bab19a8db80bc89fbb5074531edc514..55d1e198e119cb1635ed16f1e8a82cee09c0c6e5 100644
--- a/src/os/linux/src/linuxSysPara.c
+++ b/src/os/linux/src/linuxSysPara.c
@@ -15,6 +15,7 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
+#include "tsysctl.h"
 #include "tconfig.h"
 #include "tglobal.h"
 #include "tulog.h"
diff --git a/tests/tsim/src/simExe.c b/tests/tsim/src/simExe.c
index d0d798343a433b93f157ce60671d7c65488dbc75..a93d1bb262da56453939d8151630f142811f2aa7 100644
--- a/tests/tsim/src/simExe.c
+++ b/tests/tsim/src/simExe.c
@@ -119,7 +119,7 @@ char *simGetVariable(SScript *script, char *varName, int varLen) {
 int simExecuteExpression(SScript *script, char *exp) {
   char *op1, *op2, *var1, *var2, *var3, *rest;
   int op1Len, op2Len, var1Len, var2Len, var3Len, val0, val1;
-  char t0[512], t1[512], t2[512], t3[512];
+  char t0[512], t1[512], t2[512], t3[1024];
   int result;
 
   rest = paGetToken(exp, &var1, &var1Len);
@@ -310,14 +310,15 @@ void simStoreSystemContentResult(SScript *script, char *filename) {
 
 bool simExecuteSystemContentCmd(SScript *script, char *option) {
   char buf[4096] = {0};
+  char buf1[4096 + 512] = {0};
   char filename[400] = {0};
   sprintf(filename, "%s/%s.tmp", tsScriptDir, script->fileName);
 
   sprintf(buf, "cd %s; ", tsScriptDir);
   simVisuallizeOption(script, option, buf + strlen(buf));
-  sprintf(buf, "%s > %s 2>/dev/null", buf, filename);
+  sprintf(buf1, "%s > %s 2>/dev/null", buf, filename);
 
-  sprintf(script->system_exit_code, "%d", system(buf));
+  sprintf(script->system_exit_code, "%d", system(buf1));
   simStoreSystemContentResult(script, filename);
 
   script->linePos++;