Created
October 22, 2012 07:19
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SHM calculation script
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#!/usr/bin/env ruby | |
def halt | |
puts "----------------------------------" | |
puts " Usage " | |
puts "----------------------------------" | |
puts "./shm.rb <size> <units>" | |
puts "\tsize = integer > 0" | |
puts "\tunits = MB or GB" | |
exit | |
end | |
if ARGV.size != 2 | |
halt | |
end | |
size = ARGV[0].to_i | |
units = ARGV[1] | |
if size <= 0 | |
halt | |
end | |
if units != "MB" && units != "GB" | |
halt | |
end | |
case units | |
when "MB" | |
size = size * 1024 * 1024; | |
when "GB" | |
size = size * 1024 * 1024 * 1024; | |
end | |
puts "----------------------------------" | |
puts " Linux " | |
puts "----------------------------------" | |
puts "kernel.shmmax = #{size}" | |
puts "kernel.shmall = #{size / 4096}" | |
puts | |
puts "----------------------------------" | |
puts " OS X " | |
puts "----------------------------------" | |
puts "kern.sysv.shmmax = #{size}" | |
puts "kern.sysv.shmmin = 1" | |
puts "kern.sysv.shmmni = 32" | |
puts "kern.sysv.shmseg = 8" | |
puts "kern.sysv.shmall = #{size / 4096}" | |
puts | |
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