docs: private static synchronized void initialize() {
          PlatformProperties pp = PlatformProperties.getPlatformProperties();
  
          String processName = java.lang.management.ManagementFactory.getRuntimeMXBean().getName();
          String pidString = processName.substring(0, processName.indexOf('@'));
          pid = Integer.valueOf(pidString);
          initialized = true;
  
          // get the RSS and other stats from scraping "ps" from the command line
          PSScraper.PSData psdata = PSScraper.getPSData(pid);
          assert(psdata.rss > 0);
  
          // figure out how much memory this thing has
          memorysize = pp.ramInMegabytes;
          assert(memorysize > 0);
  
          // now try to figure out the best way to get the rss size
          long rss = -1;
  
          // try the mac method
          try {
              rss = ExecutionEngine.nativeGetRSS();
          }
          // This catch is broad to specifically include the UnsatisfiedLinkError that arises when
          // using the hsqldb backend on linux -- along with any other exceptions that might arise.
          // Otherwise, the hsql backend would get an annoying report to stdout
          // as the useless stats thread got needlessly killed.
          catch (Throwable e) { }
          if (rss > 0) mode = GetRSSMode.MACOSX_NATIVE;
  
          // try procfs
          rss = getRSSFromProcFS();
          if (rss > 0) mode = GetRSSMode.PROCFS;
  
          // notify users if stats collection might be slow
          if (mode == GetRSSMode.PS) {
              VoltLogger logger = new VoltLogger("HOST");
              logger.warn("System statistics will be collected in a sub-optimal "
                      + "manner because either procfs couldn't be read from or "
                      + "the native library couldn't be loaded.");
          }
      }