Date: Thu, 16 Feb 2017 15:47:01 -0600 From: Dustin Wenz <dustinwenz@ebureau.com> To: freebsd-stable@freebsd.org Subject: Jailed periodic daily scripts smashing CPU Message-ID: <321260F8-95D8-4C21-90B5-FDB0F6FF98F9@ebureau.com>
next in thread | raw e-mail | index | archive | help
I have a number of servers with roughly 60 jails running on each of them. On these hosts, I've had to disable the periodic security scans due to overly high disk load when they run (which is redundant in jails anyway). However, I still have an issue at 3:01am where the CPU is consumed by dozens of 'xz -c' processes. This is apparently daily log rolling, which I can't exactly disable. The effect is that our processing applications experience a major slowdown for about 15 seconds every morning, which is just enough that it's starting to get people's attention. What is the best way to mitigate this? I'm aware of the cron jitter feature, but I'm not sure of the 60-second jitter maximum would be enough (especially if I wanted to start utilizing more jails). - .Dustin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?321260F8-95D8-4C21-90B5-FDB0F6FF98F9>