samba - Oct 2020 - Samba Performance Monitoring?

What is the impact of turning profiling on?

profiling support = on


More specifically, we're setting up a custom Prometheus exporter for Samba,
but smbstatus does not provide a whole lot of detailed information for
samba health, etc. I was hoping for more detailed information that we can
forward to Prometheus.

So my question is:

   1. What options exist for efficiently getting metrics?
   2. Does turning on profiling support impact performance? If so, how much?
   3. Are there other things

Thanks

-- 

BOB BUCK
SENIOR PLATFORM SOFTWARE ENGINEER

SKIDMORE, OWINGS & MERRILL
7 WORLD TRADE CENTER
250 GREENWICH STREET
NEW YORK, NY 10007
T  (212) 298-9624
ROBERT.BUCK at SOM.COM

Hai, 

Well, after a question i got few days ago, i had a few min to enable this.

First request, see 
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1846947 

And if you want to test, i have a samba 4.13 ! TEST ! 
setup ready to test with profiling enabled. 

You need the following to get the test packages.

apt-get install apt-transport-https gnupg
wget -O - http://apt.van-belle.nl/louis-van-belle.gpg-key.asc | apt-key add
-
echo "# AptVanBelle repo for samba." | sudo tee
/etc/apt/sources.list.d/van-belle.list

# you need the current 4.13 line enable i use the build depends in there. 

echo "deb http://apt.van-belle.nl/debian buster-samba413 main contrib
non-free" | \
 sudo tee -a /etc/apt/sources.list.d/van-belle.list


And most important the buster-experimental repo where the 4.13 package is
available with profiling enabled. 
To keep this test as clean as possible, i removed 1 patch that i have in the
production line. 

echo "deb http://apt.van-belle.nl/debian buster-experimental main contrib
non-free" | \
 sudo tee -a /etc/apt/sources.list.d/van-belle.list


Now, please note, these are very fresh packages and need good testing. 
Change log: 
 samba (2:4.13.0+dfsg-0.1buster1Test1) buster; urgency=medium
 .
   * Non-maintainer upload.
   * Request to enable profiling.
     see also : https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1846947
     Performance will decrease a bit.
   * d/rules, enabled profiling-data
   * d/patched, removed bz14213.patch
     Since we enabled a new feature, i removed the extra patch,
     so we can make sure if we encounter problems we match the released
     samba version.

Results, the good, the bad and the ugly, please report these here in the
list, 
And preffered a reply on this thread. 
Thanks! 


Greetz, 

Louis

> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Robert Buck via samba
> Verzonden: donderdag 15 oktober 2020 15:00
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] Samba Performance Monitoring?
> 
> What is the impact of turning profiling on?
> 
> profiling support = on
> 
> 
> More specifically, we're setting up a custom Prometheus 
> exporter for Samba,
> but smbstatus does not provide a whole lot of detailed information for
> samba health, etc. I was hoping for more detailed information 
> that we can
> forward to Prometheus.
> 
> So my question is:
> 
>    1. What options exist for efficiently getting metrics?
>    2. Does turning on profiling support impact performance? 
> If so, how much?
>    3. Are there other things
> 
> Thanks
> 
> -- 
> 
> BOB BUCK
> SENIOR PLATFORM SOFTWARE ENGINEER
> 
> SKIDMORE, OWINGS & MERRILL
> 7 WORLD TRADE CENTER
> 250 GREENWICH STREET
> NEW YORK, NY 10007
> T  (212) 298-9624
> ROBERT.BUCK at SOM.COM
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba
> 
>

On Thu, Oct 15, 2020 at 08:59:48AM -0400, Robert Buck via samba
wrote:
> What is the impact of turning profiling on?
> 
> profiling support = on
> 
> 
> More specifically, we're setting up a custom Prometheus exporter for
Samba,
> but smbstatus does not provide a whole lot of detailed information for
> samba health, etc. I was hoping for more detailed information that we can
> forward to Prometheus.
> 
> So my question is:
> 
>    1. What options exist for efficiently getting metrics?
>    2. Does turning on profiling support impact performance? If so, how
much?
>    3. Are there other things
First you need to configure and compile with --with-profiling-data

smbcontrol is used to send a 'profile' message which
can set the profiling level of a target smbd:

    profile
           Change profile settings of a daemon, based on the parameter. The
parameter can be "on" to turn on profile stats collection,
"off" to turn off
           profile stats collection, "count" to enable only collection
of count stats (time stats are disabled), and "flush" to zero the
current profile
           stats. This can be sent to any

smbstatus can then dump out profiling stats
using -P or -R.

       -P|--profile
           If samba has been compiled with the profiling option, print only the
contents of the profiling shared memory area.

       -R|--profile-rates
           If samba has been compiled with the profiling option, print the
contents of the profiling shared memory area and the call rates.