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Date:   Mon, 04 Feb 2019 13:52:48 +0100
From:   Moritz M <mailinglist@moritzmueller.ee>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc:     linux-btrfs@vger.kernel.org, linux-btrfs-owner@vger.kernel.org
Subject: Re: Help needed, server is unresponsive after btrfs balance
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> 
> You're using qgroups, it's known to cause huge performance overhead for
> balance.
> 
> We have upcoming patches to solve it, but it not going to mainline
> before v5.1 kernel.
> 
> So please disable qgroups if you're not using it actively.
> 

Thanks, was not aware that I turned it on. Is

btrfs quota disable /

enough for disabling qgroups?