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ASF GitHub Bot commented on STORM-1632: --------------------------------------- Github user harshach commented on the pull request: https://github.com/apache/storm/pull/1217#issuecomment-200674706 @arunmahadevan I saw the earlier comment. Is that topology ran with 10ms sleep in the spout? @roshannaik do you also have some numbers like Arun posted , events per sec. > Disable event logging by default > -------------------------------- > > Key: STORM-1632 > URL: https://issues.apache.org/jira/browse/STORM-1632 > Project: Apache Storm > Issue Type: Bug > Components: storm-core > Reporter: Roshan Naik > Assignee: Roshan Naik > Priority: Blocker > Fix For: 1.0.0 > > > EventLogging has performance penalty. For a simple speed of light topology > with a single instances of a spout and a bolt, disabling event logging > delivers a 7% to 9% perf improvement (with acker count =1) > Event logging can be enabled when there is need to do debug, but turned off > by default. > **Update:** with acker=0 the observed impact was much higher... **25%** > faster when event loggers = 0 -- This message was sent by Atlassian JIRA (v6.3.4#6332)