private void printStats(PrimeConnectionEndStats stats) {
        if (stats.total != stats.success) {
            logger.info("Priming Connections not fully successful");
        } else {
            logger.info("Priming connections fully successful");
        }
        logger.debug("numServers left to be 'primed'="
                + (stats.total - stats.success));
        logger.debug("numServers successfully 'primed'=" + stats.success);
        logger
                .debug("numServers whose attempts not complete exclusively due to max time allocated="
                        + (stats.total - (stats.success + stats.failure)));
        logger.debug("Total Time Taken=" + stats.totalTime
                + " msecs, out of an allocated max of (msecs)="
                + maxTotalTimeToPrimeConnections);
        logger.debug("stats = " + stats);
    }
Prime connections, blocking until configured percentage (default is 100%) of target servers are primed 
or max time is reached.

@see CommonClientConfigKey#MinPrimeConnectionsRatio
@see CommonClientConfigKey#MaxTotalTimeToPrimeConnections
ribbon-loadbalancer/src/main/java/com/netflix/client/PrimeConnections.java