fix: system memory not set in ut

source/dnode/mgmt/test/sut/src/sut.cpp

@@ -30,12 +30,14 @@ void Testbase::InitLog(const char* path) {
   tsdbDebugFlag = 0;
   tsLogEmbedded = 1;
   tsAsyncLog = 0;
-  tsRpcQueueMemoryAllowed = 1024 * 1024 * 64;
   
   taosRemoveDir(path);
   taosMkDir(path);
   tstrncpy(tsLogDir, path, PATH_MAX);
-  if (taosInitLog("taosdlog", 1) != 0) {
+
+  taosGetSystemInfo();
+  tsRpcQueueMemoryAllowed = tsTotalMemoryKB * 0.1;
+if (taosInitLog("taosdlog", 1) != 0) {
     printf("failed to init log file\n");
   }
 }