kafka集群配置，但是tps上不去，但是不知道是什么原因

log4j2集成kafka，也就是说，我们这边用log4j2，作为生产者，往kafka中发送消息，但是不知道为什么吞吐量一直多上不去，开始一秒最高达到15万左右，但是后面每秒基本上都是3-5万左右。

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下面是我的kafka管理界面，分别为4台机器，由于图片一直上传不上去，只能粘贴出来，实在不好意思。

Brokers
Id    Host    Port    JMX Port    Bytes In    Bytes Out
0    1111111    PLAINTEXT:9092    -1    0.00    0.00
1    1111111    PLAINTEXT:9092    -1    0.00    0.00
2    1111111    PLAINTEXT:9092    -1    0.00    0.00
3    1111111    PLAINTEXT:9092    -1    0.00    0.00
Combined Metrics
Rate    Mean    1 min    5 min    15 min
Messages in /sec    0.00    0.00    0.00    0.00
Bytes in /sec    0.00    0.00    0.00    0.00
Bytes out /sec    0.00    0.00    0.00    0.00
Bytes rejected /sec    0.00    0.00    0.00    0.00
Failed fetch request /sec    0.00    0.00    0.00    0.00
Failed produce request /sec    0.00    0.00    0.00    0.00

然后就是我的topic的分区页面，一个topic分为20个区

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Topic Summary
Replication    1
Number of Partitions    20
Sum of partition offsets    0
Total number of Brokers    4
Number of Brokers for Topic    4
Preferred Replicas %    100
Brokers Skewed %    0
Brokers Leader Skewed %    0
Brokers Spread %    100
Under-replicated %    0

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Metrics
Rate    Mean    1 min    5 min    15 min
Messages in /sec    0.00    0.00    0.00    0.00
Bytes in /sec    0.00    0.00    0.00    0.00
Bytes out /sec    0.00    0.00    0.00    0.00
Bytes rejected /sec    0.00    0.00    0.00    0.00
Failed fetch request /sec    0.00    0.00    0.00    0.00
Failed produce request /sec    0.00    0.00    0.00    0.00
Operations

Partitions by Broker
Broker    # of Partitions    # as Leader    Partitions    Skewed?    Leader Skewed?
0    5    5    (3,7,11,15,19)    false    false
1    5    5    (0,4,8,12,16)    false    false
2    5    5    (1,5,9,13,17)    false    false
3    5    5    (2,6,10,14,18)    false    false
Consumers consuming from this topic
Please enable consumer polling here.

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Partition Information
Partition    Latest Offset    Leader    Replicas    In Sync Replicas    Preferred Leader?    Under Replicated?
0        1    (1)    (1)    true    false
1        2    (2)    (2)    true    false
2        3    (3)    (3)    true    false
3        0    (0)    (0)    true    false
4        1    (1)    (1)    true    false
5        2    (2)    (2)    true    false
6        3    (3)    (3)    true    false
7        0    (0)    (0)    true    false
8        1    (1)    (1)    true    false
9        2    (2)    (2)    true    false
10        3    (3)    (3)    true    false
11        0    (0)    (0)    true    false
12        1    (1)    (1)    true    false
13        2    (2)    (2)    true    false
14        3    (3)    (3)    true    false
15        0    (0)    (0)    true    false
16        1    (1)    (1)    true    false
17        2    (2)    (2)    true    false
18        3    (3)    (3)    true    false
19        0    (0)    (0)    true    false