解决Lettuce在多分片时线程数过多问题，需单独配置ioThreadPoolSize&computationThreadPoolSize然后共享eventExecutorGroup，非-Dio.netty.eventLoopThreads=… https://lettuce.io/

LettuceRedisClient.java

ClientResources.builder().ioThreadPoolSize(…).computationThreadPoolSize(…).eventExecutorGroup(...).build()

EventExecutorGroup eventExecutorGroup = DefaultEventLoopGroupProvider.createEventLoopGroup(DefaultEventExecutorGroup.class,
                    computationThreadPoolSize, threadFactoryProvider);
    /**
     * Create a new client that connects to the supplied uri with shared {@link ClientResources}.You need to shut down the
     * {@link ClientResources} upon shutting down your application. You can connect to different Redis servers but you must
     * supply a {@link RedisURI} on connecting.
     *
     * @param clientResources the client resources, must not be {@code null}.
     * @param uri the Redis URI, must not be {@code null}.
     * @return a new instance of {@link RedisClient}.
     */
    public static RedisClient create(ClientResources clientResources, String uri) {
        assertNotNull(clientResources);
        LettuceAssert.notEmpty(uri, "URI must not be empty");
        return create(clientResources, RedisURI.create(uri));
    }