Slow name resolution and nscd

For better scalability on nodes hosting many replicas, we recommend that you use nscd (name service cache daemon) to cache both DNS name resolution and static name resolution (via /etc/hosts).

When DNS lookups are slow, you will see a log message similar to the following:

W0926 11:19:01.339553 27231] Time spent resolve address for real 4.647s user 0.000s sys 0.000s

nscd can alleviate slow name resolution by providing a cache for the most common name service requests, such as for passwords, groups, and hosts.

Refer to your operating system documentation for how to install and enable nscd.