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>
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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=
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