High memory consumption in bind 9.18.2

[Petr Špaček]

On 18. 05. 22 22:39, Ondřej Surý wrote:
> Hi Klarstein,
> 
> Gathering the output of named statschannel should be good enough for initial assessment (json please).
> 
> For 9.18, make sure the jemalloc is being used at runtime.

Here are commands you asked for:

1. when running ./configure, make sure the output at the end has this:

Configuration summary:
-------------------------------------------------------------------------------
Optional features enabled:
     Memory allocator: jemalloc


2. Then, configure statistics channel in named.conf like this:

statistics-channels {
	inet 127.0.0.1 port 8080;
};


3. With that in place you can grab stats from this URL:
http://127.0.0.1:8080/json/v1

Configuration for v9.16 is the same, just skip the jemalloc part.

4. Bonus points for grabbing /proc/<PID>/statm content at the same time 
as content of the JSON stats endpoint (if you are on Linux).

I hope it helps.
Petr Špaček



> 
> Ondrej
> --
> Ondřej Surý — ISC (He/Him)
> 
> My working hours and your working hours may be different. Please do not feel obligated to reply outside your normal working hours.
> 
>> On 18. 5. 2022, at 22:32, Klaus Darilion via bind-users <bind-users at lists.isc.org> wrote:
>>
>> Can you please provide some commands whose output you are interested? I want to collect the statistics for 9.16 before updating to 9.18.
>> Thanks
>> Klaus
>>
>>> -----Ursprüngliche Nachricht-----
>>> Von: bind-users <bind-users-bounces at lists.isc.org> Im Auftrag von Petr
>>> Špacek
>>> Gesendet: Mittwoch, 18. Mai 2022 18:20
>>> An: bind-users at lists.isc.org
>>> Betreff: Re: AW: High memory consumption in bind 9.18.2
>>>
>>> I would be very interested in hearing more!
>>>
>>> In majority of our internal testing 9.16 has higher memory consumption
>>> than 9.18, especially when 9.18 is compiled with libjemalloc. And the
>>> differences are not small, for some configurations it can be even 2x or
>>> 3x more on 9.16 than it is on 9.18.
>>>
>>> If you encounter it again please get back to us so we can diagnose it.
>>>
>>> Thank you!
>>> Petr Špaček
>>>
>>>
>>>> On 18. 05. 22 8:56, Klaus Darilion via bind-users wrote:
>>>> I remember we had similar issues with 9.18 (isc ppa packages) and hence
>>> wen't back to 9.16. But I can not remember the details.
>>>>
>>>> regards
>>>> Klaus
>>>>
>>>>> -----Ursprüngliche Nachricht-----
>>>>> Von: bind-users <bind-users-bounces at lists.isc.org> Im Auftrag von
>>> Ondrej
>>>>> Surý101 71 l t1h, 18. Mai 2022 08:37
>>>>> An: Raman kumar <kumarraman.mca at gmail.com>
>>>>> Cc: bind-users at lists.isc.org
>>>>> Betreff: Re: High memory consumption in bind 9.18.2
>>>>>
>>>>> You did not provided any details, so we can’t really help you.
>>>>>
>>>>> What is “RAM consumption” anyway? VSZ, RSS, numbers pulled from
>>> stats
>>>>> channel from named?
>>>>>
>>>>> What’s the hardware, what is the configuration, how was BIND 9 compiled
>>>>> (or packaged)?
>>>>>
>>>>> The more details, the better
>>>>>
>>>>> Ondrej
>>>>> --
>>>>> Ondřej Surý (He/Him)
>>>>> ondrej at isc.org
>>>>>
>>>>> My working hours and your working hours may be different. Please do
>>> not
>>>>> feel obligated to reply outside your normal working hours.
>>>>>
>>>>>> On 18. 5. 2022, at 8:32, Raman kumar <kumarraman.mca at gmail.com>
>>>>> wrote:
>>>>>>
>>>>>> Hello Team,
>>>>>>
>>>>>> While upgrading from BIND 9.16.10 to 9.18.2, we have observed high
>>>>> memory consumption.
>>>>>>
>>>>>> On version 9.16.2, RAM consumption was 3.8 GB. And on 9.18.2, RAM
>>>>> consumption is 4.5 GB. Due to this an increase of approximately 20 %
>>>>> memory is observed.
>>>>>>
>>>>>> Is this the expected behaviour or any tuning is needed?
>>>>>>
>>>>>> Thanks in advance.
>>>>>>
>>>>>> Regards,
>>>>>> Raman
>>>>>> --
>>>>>> Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe
>>> from
>>>>> this list
>>>>>>
>>>>>> ISC funds the development of this software with paid support
>>>>> subscriptions. Contact us at https://www.isc.org/contact/ for more
>>>>> information.
>>>>>>
>>>>>>
>>>>>> bind-users mailing list
>>>>>> bind-users at lists.isc.org
>>>>>> https://lists.isc.org/mailman/listinfo/bind-users
>>>>
>>>
>>>
>>> --
>>> Petr Špaček
>>> --
>>> Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this
>>> list
>>>
>>> ISC funds the development of this software with paid support subscriptions.
>>> Contact us at https://www.isc.org/contact/ for more information.
>>>
>>>
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>> -- 
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>>
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>>
>>
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-- 
Petr Špaček