protected void setString(String data) {
      str = data;
      rawChars = new char[str.length()];
      str.getChars(0, str.length(), rawChars, 0);
      beginIdx = 0;
      endIdx = -1;
      nextIdx = -1;
      nextIdx();
    }
@return the number of running processes on the system
geode-core/src/main/java/org/apache/geode/internal/statistics/platform/LinuxProcFsStatistics.java