private CommBufferSizeStats serverCommBufferStats;
public NioSelectorManagerStats() {
this.numActiveConnections = new MutableInt(0);
this.serverCommBufferStats = new CommBufferSizeStats();
// Theoretically, the delay can be only upto SELECTOR_POLL_MS.
// But sometimes wallclock time can be higher
this.selectTimeMsHistogram = new Histogram(SelectorManager.SELECTOR_POLL_MS * 2,
1,