[Bug 879334] Re: nfsd from nfs-kernel-server very slow and system load from 25%-100% from nfsd

[Vagelis Nonas]

I have made a fresh install of the diskless machine with the latest
ubuntu (11.10) and the problem has gone away.

However, now that you mentioned about big files I noticed in the old
diskless file system (ubuntu 10.10) there are many hidden .nfsxxxxxxxxxx
files some of them quite big. I suppose they are left overs....

Here are a few examples (the size appears before the date):
115351481 16252 -rw-r--r--   1 root     root     16642048 Feb 26  2011 /mnt1/ubuntu/var/cache/apt/.nfs0000000002a50011000000e2
115351436 16792 -rw-r--r--   1 root     root     17236093 Sep 11 15:57 /mnt1/ubuntu/var/cache/apt/.nfs0000000006e01f8c00000063
115351478 16020 -rw-r--r--   1 root     root     16404288 Dec 20  2010 /mnt1/ubuntu/var/cache/apt/.nfs000000000057c00900000032
115351480 16208 -rw-r--r--   1 root     root     16594500 Feb 16  2011 /mnt1/ubuntu/var/cache/apt/.nfs0000000002a5001200000036
115351483 16704 -rw-r--r--   1 root     root     17102785 May  5  2011 /mnt1/ubuntu/var/cache/apt/.nfs0000000002a5004d00000032
115351460 16824 -rw-r--r--   1 root     root     17283067 Oct 22 07:45 /mnt1/ubuntu/var/cache/apt/.nfs0000000006e01fa40000009d
115351839 16820 -rw-r--r--   1 root     root     17284552 Oct 13 07:26 /mnt1/ubuntu/var/cache/apt/.nfs0000000006e0211f0000001b
115351479 16152 -rw-r--r--   1 root     root     16536128 Feb  2  2011 /mnt1/ubuntu/var/cache/apt/.nfs0000000002a5000f00000026
115351470 16804 -rw-r--r--   1 root     root     17258153 Sep 17 07:51 /mnt1/ubuntu/var/cache/apt/.nfs0000000006e01fae000000bd
115351755 16820 -rw-r--r--   1 root     root     17261588 Oct  5 07:33 /mnt1/ubuntu/var/cache/apt/.nfs0000000006e020cb00000019
115351482 16380 -rw-r--r--   1 root     root     16769594 Apr 22  2011 /mnt1/ubuntu/var/cache/apt/.nfs0000000002a5004c0000001b
115352738    4 -rw-r--r--   1 root     root         1681 Feb  2  2011 /mnt1/ubuntu/etc/.nfs0000000006e024a200000026
115353070 2097156 -rw-r--r--   1 root     root     2147483648 Mar 18  2011 /mnt1/ubuntu/etc/.nfs00000000001b807b00000028

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Title:
  nfsd from nfs-kernel-server very slow and system load from 25%-100%
  from nfsd

Status in “nfs-utils” package in Ubuntu:
  Confirmed

Bug description:
  I have a diskless ubuntu 10.10 machine which I boot regularly using
  pxe-boot from another ubuntu machine where I have the root filesystem
  of the diskless machine exported over nfs.

  I set it up about a year ago using 10.10. In the mean while the server
  machine got upgraded to 11.04 and as of yesterday to 11.10.

  After the upgrade to 11.10 the diskless machine is dead slow (most of
  the times it wont even boot completely) and the load on the server
  machine is high (25%-100% as shown from top). If in the middle of the
  diskless computer booting I do a restart of the nfs server, the client
  computer proceeds with the boot a bit more and then it gets stuck
  again. I have to restart and nfs-server 3-4 times in order to get the
  gdm login screen at the client machine

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: nfs-kernel-server 1:1.2.4-1ubuntu2
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  Date: Fri Oct 21 12:53:02 2011
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: nfs-utils
  UpgradeStatus: Upgraded to oneiric on 2011-10-20 (1 days ago)

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