On Thu, Dec 13, 2018 at 11:14 PM De Backer, Fred (Nokia - BE/Antwerp) <
fred.de_bac...@nokia.com> wrote:

> > Indeed, performance traces are important for issues like this.
> See strace of both FC27 and FC29 attached
>

Looks like you traced only the main thread. All the I/O is done in other
threads.
These flags would be useful:

    strace -o log -f -T -tt

Nir

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