答复: Bolt slow down the emit speed of spout

Thanks for your reply. Maybe I am close to the reason. I found the cpu usage of spout worker is really very high, about 200% to 400% via ‘top’ command. But KafkaSpout with Storm seems not support using multi spouts instance to read one topic. 发送自 Windows 10 版邮件

答复: Bolt slow down the emit speed of spout

I used ‘dstat -a’ which measures cpu, memory, disk and network. Disk should not be the bottleneck as my topology doesn’t have much disk operation. Log.info print tuple to disk every 1000 tuples. 发送自 Windows 10 版邮件应用 发件人: Chien Le