Re: periodic iowait spike

From: Toralf FÃrster
Date: Wed May 13 2015 - 08:50:04 EST

On 05/03/2015 12:02 PM, Toralf FÃrster wrote:
> 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]
After I deleted from that 3 TB drive (1.2 TB were filled, 1.6 TB were free) about 0.5 TB, the spikes went away.
I'm wondering that such spikes happen although the drive had more than 50 % free space ...

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