memcached "Too many open files"

memcached-0.bbh.cyberschool.army.mil: * memcached.service - memcached daemon Loaded: loaded (/lib/systemd/system/memcached.service; enabled; vendor preset: enabled) Active: active (running) since Sat 2017-05-20 13:53:08 EDT; 2 days ago Main PID: 960 (memcached) Tasks: 6 Memory: 50.4M CPU: 2min 29.123s CGroup: /system.slice/memcached.service `-960 /usr/bin/memcached -m 64 -p 11211 -u memcache -l 10.10.6.240

May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:40 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:41 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:41 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:41 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files
May 22 13:28:42 memcached-0 systemd-memcached-wrapper[960]: accept4(): Too many open files