[URGENT] Samba 4.0.9 smbd slow.

David Collier-Brown davec-b at rogers.com
Wed Sep 25 09:30:18 MDT 2013

Thanks: I'm curious, too, as it's a performance "can't happen", and
they're fun.


On 09/25/2013 11:14 AM, jplorier at gmail.com wrote:
> Ok, I'll do a tcpdump to see network traffic and pastebin it
> Regards
> El sep 25, 2013 11:42 AM, "Jeremy Allison" <jra at samba.org> escribió:
>> On Wed, Sep 25, 2013 at 07:31:13AM -0700, Richard Sharpe wrote:
>>> On Wed, Sep 25, 2013 at 4:45 AM, Juan Pablo Lorier <jplorier at gmail.com>
>> wrote:
>>>> Hi Richard,
>>>> I'll take a look at the resources at the time the problem starts, but I
>>>> can tell you that either CPU or RAM are not being fully used.
>>>> CPU is over 90% idle all the time and ram is less than 4GB out of 12GB
>>>> for the hole system and I don't remember seen a notifying increase in
>>>> any of the smbd instances.
>>>> By slow down is that a user that is already logged to a share, just to
>>>> change folder may take over a minute, yesterday, rendering a file took
>>>> over 8 minutes to start and then it worked as usually. All this
>>>> "latency" disappears when I restart smbd.
>>>> I didn't compile from git as I'm trying to get "stable" releases for
>>>> this matter though I know it's not really stable.
>>>> Regards,
>>> Hmmm, what clients? As in, SMB1 or SMB2?
>>> I have seen cases where SMB1 clients get into a crazy mode where they
>>> are sending thousands of requests for what looks like the same info.
>>> It comes and goes, it seems, and I have never figured out what
>>> provokes this.
>>> We saw it happen with Autocad ...
>> Wireshark captures are also extremely useful when it's
>> going this slowly.
>> Jeremy.

David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
davecb at spamcop.net           |                      -- Mark Twain
(416) 223-8968

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