Support caching of extracted zip artifacts

docs/trains.conf

@@ -167,6 +167,10 @@ sdk {
 
             # Log all stdout & stderr
             log_stdout: true
+
+            # compatibility feature, report memory usage for the entire machine
+            # default (false), report only on the running process and its sub-processes
+            report_global_mem_used: false
         }
     }
 }