Latency much higher than jedis in certain condition

Redisson version: 3.15.1 Jedis version: 3.7.0

Following test snippet shows that redisson latency is 10 times higher than jedis:

        Config config = new Config();
        config.setCodec(new StringCodec());
        config.setTransportMode(TransportMode.NIO);
        config.useClusterServers().addNodeAddress(xxxxx);
        RedissonClient redissonClient = Redisson.create(config);
        RBucket<String> bucket = redissonClient.getBucket("kkkkkey");

        // warm up
        for (int i = 0; i < 200; i++) {
            bucket.get();
        }

        int cnt = 0;
        long total = 0;
        long start = System.currentTimeMillis();
        while (true) {
            long before = System.currentTimeMillis();
            String value = bucket.get();
            long latency = System.currentTimeMillis() - before;
            total += latency;
            System.out.println(latency + "---" + value);
            ++cnt;
            if (System.currentTimeMillis() - start > 5000) {
                break;
            }
        }

        System.out.println( "redisson avg " + ((double)total / cnt) );

        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        JedisCluster jc = new JedisCluster(jedisClusterNodes, 10000, 10000, 100, "*********", jedisPoolConfig);
        start = System.currentTimeMillis();
        total = 0;
        cnt = 0;
        while (true) {
            long before = System.currentTimeMillis();
            String value = jc.get("kkkkkey");
            long latency = System.currentTimeMillis() - before;
            total += latency;
            System.out.println(latency + "---" + value);
            ++cnt;
            if (System.currentTimeMillis() - start > 5000) {
                break;
            }
        }

        System.out.println( "jedis avg " + ((double)total / cnt) );

The result is “redisson avg 7.8” and “jedis avg 0.7”. I think this is related to epoll being slow but I don’t how to confirm that.

[Nick-The-Uncharted]

Problem sloved, redisson was reading slave while jedis is reading master, Slave node has much worse performance than master.

[mrniko]

I stopped another applicaiton(on another ecs) that cause some pressue on redis. The redisson latency suddenly dropped to 0.8ms, so weird.

You may need to check your environment.