true Eric Lindvall

memory

class MemoryProfiler < Scout::Plugin
  def build_report
    mem_info = {}
    `cat /proc/meminfo`.each_line do |line|
      _, key, value = *line.match(/^(\w+):\s+(\d+)\s/)
      mem_info[key] = value.to_i
    end
    
    # memory info is empty - operating system may not support it (why doesn't an exception get raised earlier on mac osx?)
    if mem_info.empty?
      raise "No such file or directory"
    end
    
    mem_total = mem_info['MemTotal'] / 1024
    mem_free = (mem_info['MemFree'] + mem_info['Buffers'] + mem_info['Cached']) / 1024
    mem_used = mem_total - mem_free
    mem_percent_used = (mem_used / mem_total.to_f * 100).to_i

    swap_total = mem_info['SwapTotal'] / 1024
    swap_free = mem_info['SwapFree'] / 1024
    swap_used = swap_total - swap_free
    unless swap_total == 0    
      swap_percent_used = (swap_used / swap_total.to_f * 100).to_i
    end
    
    # will be passed at the end to report to Scout
    report_data = Hash.new

    report_data['Memory Total'] = mem_total
    report_data['Memory Used'] = mem_used
    report_data['% Memory Used'] = mem_percent_used

    report_data['Swap Total'] = swap_total
    report_data['Swap Used'] = swap_used
    unless  swap_total == 0   
      report_data['% Swap Used'] = swap_percent_used
    end
    report(report_data)
        
  rescue Exception => e
    if e.message =~ /No such file or directory/
      error('Unable to find /proc/meminfo',%Q(Unable to find /proc/meminfo. Please ensure your operationg system supports procfs:
         http://en.wikipedia.org/wiki/Procfs)
      )
    else
      raise
    end
  end
end

2008-04-17T07:36:17-07:00

Returns a profile of the system's memory usage (Swap Total, Swap Used, Swap Used, Memory Total, Memory Used, and Memory Used). <br/><br/> *Compatibility* Requires "procfs":http://en.wikipedia.org/wiki/Procfs, which is supported under Solaris, BSD, and Linux: false 15 --- | metadata: Memory Total: units: MB precision: 0 larger_is_better: true Memory Used: units: MB precision: 0 % Memory Used: units: % precision: 0 Swap Total: units: MB precision: 0 Swap Used: units: MB precision: 0 % Swap Used: units: % precision: 0 triggers: - type: peak dname: % Swap Used max_value: 50 Memory Profiler

477

5.0

Memory Profiler Plugin ===================== Created by Eric Lindvall Compatibility ------------- Requires [procfs](http://en.wikipedia.org/wiki/Procfs), which is supported under Solaris, BSD, and Linux: Functionality ------------- Returns a profile of the system's memory usage: * Swap Total * Swap Used * % Swap Used * Memory Total * Memory Used * % Memory Used

Returns a profile of the system's memory usage (memory used, % memory used, swap used, % swap used, etc). Requires procfs.

linux

2010-03-03T21:16:26-08:00

http://github.com/highgroove/scout-plugins/raw/master/memory_profiler/memory_profiler.rb