void increaseConnOpened(SessionProtocol protocol, InetSocketAddress remoteAddr,
                            InetSocketAddress localAddr) {
        final List<Tag> commonTags = commonTags(protocol, remoteAddr, localAddr);
        lock.lock();
        try {
            final Meters meters = metersMap.computeIfAbsent(commonTags, Meters::new);
            meters.increment();
        } finally {
            lock.unlock();
        }
    }
Creates a new instance with the specified {@link Meter} name.
core/src/main/java/com/linecorp/armeria/client/ConnectionPoolMetrics.java