How to increase memcache value size limit with python-memcached on centos¶

By default, the value size of a single memcache item is limited to 1MB. How can we increase it?

In the following chapters, we will set the size limit to 10MB.

Config memcache service¶

Edit file /etc/sysconfig/memcached and add the following line:

OPTIONS="-I 10M"

Then restart memcache service.

Python client¶

If you are using python-memcached library to access memcache, you need to update your python code.

Before execute python-memcached's functions, you should update memcache.SERVER_MAX_VALUE_LENGTH:

import memcache
# update size limit
memcache.SERVER_MAX_VALUE_LENGTH = 1024 * 1024 * 10
# access memcache later
mc = memcache.Client(['127.0.0.1:11211'], debug=0)
mc.set("some_key", "Some value")