[pbs-devel] [PATCH proxmox-backup] fix #3359: fix blocking writes in async code during pxar create
Dietmar Maurer
dietmar at proxmox.com
Wed Mar 24 08:47:44 CET 2021
> On 03/24/2021 8:43 AM Dominik Csapak <d.csapak at 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 ...
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