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t27duck/github_unicorn_killer.rb

Created July 3, 2017 18:06
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  1. t27duck created this gist Jul 3, 2017.
    27 changes: 27 additions & 0 deletions github_unicorn_killer.rb
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    Original file line number Diff line number Diff line change
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    #! /usr/bin/env ruby

    unicorn_worker_memory_limit = 460_000

    loop do
    begin
    # unicorn workers
    #
    # ps output line format:
    # 31580 275444 unicorn_rails worker[15] -c /data/github/current/config/unicorn.rb -E production -D
    # pid ram command

    lines = `ps -e -www -o pid,rss,command | grep '[u]nicorn_rails worker'`.split("\n")
    lines.each do |line|
    parts = line.split(' ')
    if parts[1].to_i > unicorn_worker_memory_limit
    # tell the worker to die after it finishes serving its request
    ::Process.kill('QUIT', parts[0].to_i)
    end
    end
    rescue Object
    # don't die ever once we've tested this
    nil
    end

    sleep 60
    end