Hi,

1. Find the Qemu pid with "ps ax"

2. Collect the FD used by the Qemu with "ls /proc/$pid/fd/ | wc -w" // $pid is the Qemu pid

3. cat /proc/$pid/limits | grep -E 'open files | processes'

Do you have the configuration file /etc/libvirt/qemu.conf on the computer?

Find the line with max_files = which defines how many FD qemu can have.

On Tue, 3 Sep 2019 at 21:24, Gesiel Galvão Bernardes <gesiel.bernardes@gmail.com> wrote:

Hi,

Em qui, 29 de ago de 2019 às 22:32, fengyd <fengyd81@gmail.com> escreveu:
Hi,

The issue is still there?
Yes, yet.
I have met an IO peformance issue recently and found that the count of the max fd for the Qemu/KVM was not bigger enough, the fd for Qemu/KVM was exhausted, the issue was solved after increasing the count of the max fd.

How check and increase max fd for qemu? Can you give-me way?

Regards,
Gesiel

On Wed, 21 Aug 2019 at 20:53, Gesiel Galvão Bernardes <gesiel.bernardes@gmail.com> wrote:
Hi Eliza,

Em qua, 21 de ago de 2019 às 09:30, Eliza <eli@chinabuckets.com> escreveu:
Hi

on 2019/8/21 20:25, Gesiel Galvão Bernardes wrote:
> I`m use a Qemu/kvm(Opennebula) with Ceph/RBD for running VMs, and I
> having problems with slowness in aplications that many times not
> consuming very CPU or RAM. This problem affect mostly Windows. Appearly
> the problem is that normally the application load many short files (ex:
> DLLs) and these files take a long time to load, generating a slowness.

Did you check/test your network connection?
Do you have a fast network setup?

I have a bond of two 10GB interfaces, with little use.

regards.
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