[Bro-Dev] [JIRA] (BIT-949) High CPU from polling loop on low traffic links

Jon Siwek (JIRA) jira at bro-tracker.atlassian.net
Thu Oct 30 11:42:08 PDT 2014

     [ https://bro-tracker.atlassian.net/browse/BIT-949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jon Siwek updated BIT-949:
    Resolution: Fixed
        Status: Closed  (was: Open)

> High CPU from polling loop on low traffic links
> -----------------------------------------------
>                 Key: BIT-949
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-949
>             Project: Bro Issue Tracker
>          Issue Type: Problem
>          Components: Bro
>    Affects Versions: git/master
>            Reporter: liamrandall
>            Priority: Low
>             Fix For: 2.4
> In low or no traffic links Bro consumes a large amount of the CPU.  Bro has a core processing loop that it needs to do regularly which involves checking for packets from interfaces, checking for communication traffic (in the case of a cluster of Bro processes), processing scheduled events, etc.  It's this processing loop that is causing the CPU utilization when there is no traffic.
> Moving Bro to standalone mode will reduce the CPU load on sensors with out traffic.

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