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Thread: Slow SMB connection after update (13.10)

  1. #1
    Join Date
    Dec 2013
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    2

    Slow SMB connection after update (13.10)

    Hi,

    Recently, I upgrade my home server's OS 13.10 x64 from 13.04 (Desktop version) as a Web and NAS like server.
    Right after upgrade, everything was just fine. SMB connection can makes avg 114MB, full-throttle on gigabit network.

    But, the problem is after automatic system update, SMB speed getting really slow! It makes only 15MB/s maximum.
    So I test the network speed with "iperf" between the server and a windows desktop but there was no problem with connection speed on my LAN.

    I search the forum and Google, and I tried several things like,
    Clean system install, "TCP_NODELAY" trick in the "smb.conf", Jumbo Frame (MTU)... but those things can't fix my problem.

    Is this a bug on some updated package or it there any file changes after system update?

    Current my Ubuntu system is
    Intel Xeon E3-1280 / MSI Z77A-G43 / 8GB DDR3 / and a dual lan card.

    All my network looks okay.

    Thanks in advance.

    ps. sorry for my English

  2. #2
    Join Date
    Dec 2013
    Beans
    2

    Re: Slow SMB connection after update (13.10)

    Okay self-solving the problem.

    The latest kernel (3.11.0-14) was the problem. 3.11.0-12 is fine.

    If you have any networking related problem, don't use 3.11.0-14 kernel. It looks have a problem with networking part.


    Edit: How can I change this thread as SOLVED?
    Last edited by enpinion; December 11th, 2013 at 01:34 PM. Reason: Edit: How can I change this thread as SOLVED?

  3. #3
    Join Date
    Jun 2013
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    3

    Re: Slow SMB connection after update (13.10)

    Thank you very much, I had the same problem and this is the only place I could find the answer. 3.11.0-13 works fine too.

  4. #4
    Join Date
    Jan 2014
    Beans
    2

    Re: Slow SMB connection after update (13.10)

    I'm seeing this same issue as well. It started with 3.11.0.14 as with OP. I just updated to 3.11.0-15 and it too has the problem. I was getting full gigabit speeds, now about 1/10th the speed. Booting back to 3.11-12 returns speed to normal. Tested via samba with shares on both SSD and spinning disks.

  5. #5
    Join Date
    May 2011
    Beans
    30

    Unhappy Re: Slow SMB connection after update (13.10)

    I'm having the same issue Until recently I was getting transfer rates of 80-90MB/s. But after recent updates I'm only getting 7-9MB/s. I first thought something was wrong with the ethernet connection (running at 100MBit instead of 1GBit). But that's not the case. Is there a bug report for this issue somewhere so we can expect an update anytime soon? Thanks, Timo

  6. #6
    Join Date
    Aug 2008
    Location
    Spain
    Beans
    10

    Re: Slow SMB connection after update (13.10)

    I'm having the same issue too, can't stream FullHD content over Samba, only NFS. Any word on a fix?

  7. #7
    Join Date
    Feb 2014
    Beans
    21

    Re: Slow SMB connection after update (13.10)

    Oh my god Thank you so very much. Downgraded the kernel and got arround 930 Mbps. You are a godsent my friend!

  8. #8
    Join Date
    Jun 2012
    Beans
    1

    Re: Slow SMB connection after update (13.10)

    I also noticed that suddenly, my transfer speed over a wired network to a Samba share was down to 14 MB/s.
    My issue now is that when booting in the older 3.11.0-13 kernel, my XFCE session just locks up and accepts no keyboard or mouse input. So I'm afraid this won't be a good option for me. The only bug report I found related to this was https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1259634 and it looks like it's fixed upstream, so I decided to bite the bullet and upgrade to Trusty Tahr (Alpha).
    Last edited by ccerghe1; February 6th, 2014 at 02:34 PM.

  9. #9
    Join Date
    Aug 2008
    Location
    Spain
    Beans
    10

    Re: Slow SMB connection after update (13.10)

    Is it fixed in Trusty? I'm still having the same problems....

  10. #10
    Join Date
    Jan 2014
    Beans
    2

    Re: Slow SMB connection after update (13.10)

    This seems to be fixed with kernel 3.11.0-17. I'm now getting full speed via smb in and out.

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