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Date: Wed, 24 Mar 2021 08:47:44 +0100 (CET)
From: Dietmar Maurer <dietmar@proxmox.com>
To: Dominik Csapak <d.csapak@proxmox.com>,
 Proxmox Backup Server development discussion <pbs-devel@lists.proxmox.com>,
 Wolfgang Bumiller <w.bumiller@proxmox.com>,
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Subject: Re: [pbs-devel] [PATCH proxmox-backup] fix #3359: fix blocking
 writes in async code during pxar create
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> On 03/24/2021 8:43 AM Dominik Csapak <d.csapak@proxmox.com> wrote:
> 
>  
> On 3/24/21 08:17, Dietmar Maurer wrote:
> >> Fixes: 6afb60abf557 ("asyncify pxar create_archive")
> > 
> > I am not sure, but maybe 6afb60abf557 is also the cause for
> > the performance regression?
> > 
> > (reported at https://bugzilla.proxmox.com/show_bug.cgi?id=3174)
> > 
> 
> i mean not the perfect benchmark, but here on a relatively
> empty vm (~2GB root disk) with 4 cores + 4GiB Memory
> 
> there is no measurable difference between before
> that commit and after

Maybe you test on SDD?

Please can you also test on a slow disk with large seek times?

Also, please drop caches before the test ...