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jia.fu commented on STORM-297: ------------------------------ I met this issue yet .anyone has a solution on production storm cluster ? > Storm Performance cannot be scaled up by adding more CPU cores > -------------------------------------------------------------- > > Key: STORM-297 > URL: https://issues.apache.org/jira/browse/STORM-297 > Project: Apache Storm > Issue Type: Bug > Reporter: Sean Zhong > Assignee: Sean Zhong > Labels: Performance, netty > Fix For: 0.9.2-incubating > > Attachments: Storm_performance_fix.pdf, > storm_Netty_receiver_diagram.png, storm_conf.txt, > storm_performance_fix.patch, worker_throughput_without_storm-297.png > > > We cannot scale up the performance by adding more CPU cores and increasing > parallelism. > For a 2 layer topology Spout ---shuffle grouping--> bolt, when message size > is small (around 100 bytes), we can find in the below picture that neither > the CPU nor the network is saturated. When message size is 100 bytes, only > 40% of CPU is used, only 18% of network is used, although we have a high > parallelism (overall we have 144 executors) -- This message was sent by Atlassian JIRA (v6.3.4#6332)