[Nix-dev] NFS performance issues after upgrade to 16.09

[4levels]

Hi Jonas,

disabling fail2ban didn't help, now the Nginx webserver keeps crashing as
soon as a php error occurs.
Do you know by any chance if with the upgrade to nixos-16.09 a newer
version of NFS is included than in 16.03?  Maybe some default parameters in
NFS have changed causing this havoc.
As a more general question: how can I see which version of package x is
used in nixos version y?

Kind regards,

Erik

On Thu, Oct 13, 2016 at 11:05 AM 4levels <4levels at gmail.com> wrote:

Hi,

thank you for your suggestions.  I've disabled the firewall and fail2ban
services, let's hope that does the trick!
I'll report back when things are better..

Kind regards,

Erik

On Thu, Oct 13, 2016 at 9:09 AM zimbatm <zimbatm at zimbatm.com> wrote:

Hi,

What happens if you disable fail2ban? Maybe the behaviour has changed.

Or try to change the kernel and NFS versions.

I know it's not much help, all I can recommend is to try and replace each
component to reduce the error.

On Wed, 12 Oct 2016, 10:51 4levels, <4levels at gmail.com> wrote:

Dear Nix'ers,

I've a permanent issue since the upgrade to nixos-16.09 in my local vm
(with kvm-qemu from an SSD partition).  The load of the vm is increasing
over time without any signs in the output of top.  Bash completion when
traversing directories stalls and the whole system becomes unresponsive
after about 5 to 10 minutes with top showing a load > 30.  Even rebooting
fails with several services failing to stop (eg. fail2ban, phpfpm, ).

This has everything to do with NFS: as soon as I disable the NFS mounts,
the system maintains normal operation.  Nginx / phpfpm are using NFS
mounted folders for local development.

These are the filesystem declarations in the nixops expression:

  fileSystems."/data/dev" = {
    device = "d01:/data/dev";
    fsType = "nfs";
    options = [ "defaults" "noatime" "nolock" "noacl" "vers=3" "udp"
"actimeo=1" ];
  };
  fileSystems."/extra/Documents" = {
    device = "d01:/extra/Documents";
    fsType = "nfs";
    options = [ "defaults" "noatime" "nolock" "noacl" "vers=3" "udp"
"actimeo=1" ];
  };

with d01 being declared in extrahosts

      networking.extraHosts = "192.168.121.1 d01 d01.local";

Has anyone an idea how this could be related to the upgrade to 16.09?  On
16.03 this all worked normally..

Kind regards,

Erik aka 4levels

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