static S renderMemoryPoolSizes2() {
  new L<S> lines;
  long totalCommitted = 0;
  for (MemoryPoolMXBean b : ManagementFactory.getMemoryPoolMXBeans()) {
    long committed = b.getUsage().getCommitted();
    lines.add(padLeft(str(toM(committed)), 4) + " MB committed: " +  b.getName());
    totalCommitted += committed;
  }
  lines.add("");
  lines.add("Total committed memory: " + toM(totalCommitted) + " MB");
  ret lines(lines);
}