I couldn't say the reason, but the I/O for db59 [http://ganglia.wikimedia.org/latest/graph_all_periods.php?h=db59.pmtpa.wmnet&m=cpu_report&r=hour&s=by%20name&hc

I couldn't say the reason, but the I/O for db59 [http://ganglia.wikimedia.org/latest/graph_all_periods.php?h=db59.pmtpa.wmnet&m=cpu_report&r=hour&s=by%20name&hc=4&mc=2&st=1355622088&g=network_report&z=large&c=MySQL%20pmtpa http://ganglia.wikimedia.org/latest/graph_all_periods.php?h=...] is much higher than the other servers as well. Also, despite the switch on db59 happening a few days ago, there doesn't seem to be a significant change in overall CPU usage: http://ganglia.wikimedia.org/latest/graph.php?r=month&z=xlarge&h=db59.pmtpa.wmnet&m=cpu_report&s=by+name&mc=2&g=cpu_report&c=MySQL+pmtpa http://ganglia.wikimedia.org/latest/graph.php?r=month&z=...