Check guaranteed Ram, burstable Ram and Error Counts on your OpenVZ VPS

#!/usr/bin/env ruby
#
# Program to check for failed count on OpenVZ systems
#   Failed counts indicate over commit on memory. 
#   it should always be zero.
 
 
@file = `cat /proc/user_beancounters`.split("\n")
 
# Delete the first 3 lines, which are irrelevant to us.
@file.delete_at(0)
@file.delete_at(0)
@file.delete_at(0)
 
@failcnt = []
 
@file.each do |t|
  tmp = t.split
  unless tmp.last == "0"
    @failcnt << tmp
  end
end
 
# Check that 'held' is less than 'barrier' 
#   held = current count
#   barrier = soft limit
# only checking for:
#   privvmpages @file[1] 
#   oomguarpages @file[7] 
# 
# oomguarpages : 
#   The out-of-memory guarantee, in pages. 
#   Any VE process will not be killed even in case of heavy 
#   memory shortage if the current memory consumption 
#   (including both physical memory and swap) 
#   does not reach the oomguarpages barrier.
#
# privvmpages: 
#  The size of private (or potentially private) memory allocated by an application. 
#  The memory that is always shared among different applications 
#  is not included in this resource parameter.
# 
# Sources: 
#  - http://wiki.openvz.org/UBC_secondary_parameters
#  - http://wiki.vpslink.com/Meaning_of_the_/proc/user_beancounters_Values
 
privvmpages = @file[1].split
privvmpages_current = privvmpages[1].to_i
privvmpages_limit = privvmpages[3].to_i
if privvmpages_current > privvmpages_limit
  puts "WARNING: #{privvmpages[0]} has passed the limit: #{privvmpages_current}/#{privvmpages_limit}"
  puts "WARNING: Server may crash or reboot"
end
# Also check it we are getting close to 70% of usage
privvmpages_pc = ((privvmpages_current.to_f/privvmpages_limit)*100).ceil
if privvmpages_pc > 70
  puts "WARNING: #{privvmpages[0]} is high: #{privvmpages_pc}% of limit"
end
 
oomguarpages = @file[7].split
oomguarpages_current = oomguarpages[1].to_i
oomguarpages_limit = oomguarpages[3].to_i
if oomguarpages_current > oomguarpages_limit
  puts "WARNING: #{oomguarpages[0]} has passed the limit: #{oomguarpages_current}/#{oomguarpages_limit}"
  puts "WARNING: Some Processes may be killed"
end
# Also check it we are getting close to 85% of usage
oomguarpages_pc = ((oomguarpages_current.to_f/oomguarpages_limit)*100).ceil
if oomguarpages_pc > 85
  puts "WARNING: #{oomguarpages[0]} is high: #{oomguarpages_pc}% of limit"
end
 
unless @failcnt.empty?
  puts "=================================="
  puts "Found Memory problems with OpenVZ:"
  puts "=================================="
  @failcnt.each do |t|
    puts "#{t.join(' - ')}"
    puts "=================================="
  end
end