real BIND start time

Mathew Ian Eis Mathew.Eis at
Thu Jan 5 22:07:49 UTC 2017

ps -C named -o start,lstart is the time since the process was started.

One can also force BIND to “reset” with a SIGHUP without actually stopping and starting the daemon.

This will cause (among many other things) the pid file to be reset. (You can also find a “general: notice: running” about this time in the logs that should pretty closely align with the last reset time, or startup time if there is none.).

The “reset” probably explains the difference between the two times that you see.

The stats counters are since startup time and not affected by a reset as far as I am aware.


Mathew Eis
Northern Arizona University
Information Technology Services

From: bind-users <bind-users-bounces at> on behalf of Jonathan Reed <jreed777 at>
Date: Thursday, January 5, 2017 at 1:54 PM
To: bind-users <bind-users at>
Subject: real BIND start time


I'm running rndc stats and trying to determine how long the stats are good for. I'm querying the server start time by a couple methods but they're not the same. Which one should I rely on?

$ date -r /var/run/named/
Sun Jan  1 03:38:04 EST 2017
$ ps -C named -o lstart=
Sat Dec 24 12:03:47 2016

I'm using the version bind-9.8.2-0.23.rc1.el6_5.1.x86_64 package on CentOS.

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