buffer.append("Warehouse Histograms:\n");
for (Integer w_id : histograms.keySet()) {
ObjectHistogram hist = histograms.get(w_id);
buffer.append("Partition: " + w_id + " [" + distributions.get(w_id).getMin() + "]\n");
buffer.append(hist).append("\n");
hist.save(new File("histograms/" + w_id + ".hist"));
} // FOR
LOG.info(buffer.toString());
return;
}