Memcached/Keystone RHOSP 13 max_memory setting

Hi,

I've notice that the memcached process on the controllers over the past couple of weeks is increasing the amount of memory its using. In the last 4 days its increased by 2GB.

The article https://access.redhat.com/solutions/4220701 makes reference to a max_memory setting and comments memcached by default uses 50% of the available memory. But this article relates to the undercloud memcache configuration.

Is there a similar setting for the overcloud , when memcached is used for caching keystone. ref https://access.redhat.com/solutions/3679131

I've looked the in keystone.conf file and there doesn't seem to be.

Does memcached have the same default behaviour of using 50% of available memory on the controllers ?

Thanks
Michael