From: "Toralf Förster" <toralf.foerster@gmx.de>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: periodic iowait spike
Date: Sun, 03 May 2015 12:02:08 +0200 [thread overview]
Message-ID: <5545F220.1060902@gmx.de> (raw)
The picture in [1], created with isag from the sysstat package, shows a periodic spike in the iowait of my tinderbox server (hardened Gentoo 3.19.6-r1), correlating to write transactions per seconds from a similar graph.
I'm wondering what (kernel, btrfs or ?) is causing this.
[1] http://www.zwiebeltoralf.de/pub/sar_cpu_3rdMay.png
--
Toralf
pgp key: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 0076 E94E
--
"; the past is all dirty and cruel in the modern popular imagination, with the exception of the Romans, who are just cruel"
Ian Mortimer, 2008, "The Time Traveller's Guide to Medieval England"
next reply other threads:[~2015-05-03 10:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-03 10:02 Toralf Förster [this message]
2015-05-06 14:02 ` periodic iowait spike David Sterba
2015-05-08 20:22 ` Toralf Förster
2015-05-13 12:49 ` Toralf Förster
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