Shows how rss memory changes during usage of redis gem

redis-mem.rb

require 'redis'

def Process.rss ; `ps -o rss= -p #{Process.pid}`.chomp.to_i ; end
def Process.pretty_rss 
	GC.start(full_mark: true, immediate_sweep: true)
	Process.rss.to_s.gsub(/(\d)(?=(\d{3})+(\..*)?$)/,'\1,') + " kilobytes"
end

puts "start: #{Process.pretty_rss}"

r = Redis.new
r.del('test')
r = nil

puts "after cleanup: #{Process.pretty_rss}"

r = Redis.new
r.pipelined do
	10000.times do
		r.lpush('test', 'dummystring'*1000)
	end
end

r = nil

puts "after insert: #{Process.pretty_rss}"

r = Redis.new
10000.times do
	r.brpop('test')
end

r = nil

puts "after pop: #{Process.pretty_rss}"