SERVER_ERROR out of memory storing object with memcached 1.4.10

memcached-oom.py

#!/usr/bin/python

import memcache
import sys
import random


MEMCACHED_SERVER = sys.argv[1]
MEMCACHED_PORT = '11211'
MEMCACHED_KEY = 'testing.' + str(random.randint(1, pow(2,16))) + '.'
MEMCACHED_VALUE = 'a' * 1024
MEMCACHED_MIN_EXPTIME = 60
MEMCACHED_MAX_EXPTIME = 600
MEMCACHED_DELETE_RATIO = 1000

DEBUG_RATIO = 100000

count = 0
error_count = 0
delete_count = 0

# connect error = EADDRNOTAVAIL (/proc/sys/net/ipv4/ip_local_port_range)
mc = memcache.Client(['%s:%s' % (MEMCACHED_SERVER, MEMCACHED_PORT)], debug=0)

while 1:
	try:
		key = MEMCACHED_KEY + str(count)

		# random expiration time
		exptime = random.randint(MEMCACHED_MIN_EXPTIME, MEMCACHED_MAX_EXPTIME)

		if count % DEBUG_RATIO == 0:
			print 'DEBUG: key = %s, exptime = %s' % (key, exptime)

		mc.set(key, MEMCACHED_VALUE, exptime)
		stored = mc.get(key)

		if stored != MEMCACHED_VALUE:
			print 'ERROR! %d => sent = %s, stored = %s' % (count, MEMCACHED_VALUE, stored)
			error_count = error_count + 1
			print key
			sys.exit(-1)

		# key delete with ratio
		if count % MEMCACHED_DELETE_RATIO == 0:
			#print 'DEBUG: deleting %s key' % key
			mc.delete(key)
			delete_count = delete_count + 1

		count = count + 1

	except KeyboardInterrupt:
		mc.disconnect_all()
		print '\ntotal keys = %d' % count
		print 'total keys deleted = %d' % delete_count
		print 'total errors found = %d' % error_count
		sys.exit()