image.png
測試使用的消息為
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test1
生產(chǎn)者發(fā)送六十萬，一個消費者，接收消息后寫入log4j本地磁盤，結(jié)果如下（單位：ms）
image.png
日志文件為：
image.png
test2
image.png
image.png
經(jīng)過測試發(fā)現(xiàn)spring kafka中封裝的concurrency是指再實例上創(chuàng)建多少個consumer進(jìn)行消費，對應(yīng)parttition的數(shù)量一致。
spring.kafka.listener.concurrency= 6
