[Pdns-users] PDNS Authoritative and Mariadb share single core but multiple available

[George Asenov]

Yes I understand that this test is not relevant!

The one think I didn't understand is why two different services working 
with 2 different users share 1 core at 100% and not working on separate 
cores/treads ?
Even if the requests are not overlapping i think the two services should 
work independently to each other or I'm mistaken somewhere?

On 31-Oct-19 17:16, Otto Moerbeek wrote:
> On Thu, Oct 31, 2019 at 05:08:50PM +0200, George Asenov wrote:
> 
>>
>> Here is a dnsperf test
>> https://monosnap.com/direct/IijS7l37a4r1Ck7dVKeO1UAf6kvEg0
>>
>> # dnsperf -s XXX.XXX.XXX.XXX -c 10000 -T 5 -d domainslist.txt -n 100
>> DNS Performance Testing Tool
>> Nominum Version 2.1.0.0
>>
>> [Status] Command line: dnsperf -s XXX.XXX.XXX.XXX -c 10000 -T 5 -d
>> domainslist.txt -n 100
>> [Status] Sending queries (to XXX.XXX.XXX.XXX)
>> [Status] Started at: Thu Oct 31 07:43:52 2019
>> [Status] Stopping after 100 runs through file
>> [Status] Testing complete (end of file)
>>
>> Statistics:
>>
>>    Queries sent:         83800
>>    Queries completed:    83800 (100.00%)
>>    Queries lost:         0 (0.00%)
>>
>>    Response codes:       NOERROR 24400 (29.12%), NXDOMAIN 1400 (1.67%),
>> REFUSED 58000 (69.21%)
>>    Average packet size:  request 36, response 43
>>    Run time (s):         4.157266
>>    Queries per second:   20157.478497
>>
>>    Average Latency (s):  0.002703 (min 0.000924, max 0.265014)
>>    Latency StdDev (s):   0.009624
>>
>>   PDNS process all the requests sequentially not paralel?
>>
>> If that is not a relevant test let me know how to.
> 
> We were talking about performance of notify etc. And now you're
> posting something about general query performance.
> 
> I think your question about using a single core for master/slave
> operations was answered. If you have more questions about that subject
> say so.
> 
> If you want to talk about general performance (measurement) start a new
> subject.
> 
> 	-Otto
> 
>>
>> On 31-Oct-19 16:37, Otto Moerbeek wrote:
>>> On Thu, Oct 31, 2019 at 02:28:48PM +0000, Brian Candler wrote:
>>>
>>>> On 31/10/2019 13:44, George Asenov wrote:
>>>>> For example if the mariadb get 70% pdns 30% if i check the load by cores
>>>>> one core has 0%id all other 3 are near 100%id .
>>>>> here are some screenshots
>>>>
>>>> Looks like sequential operation to me:
>>>>
>>>> 1. pdns sends a query to mariadb (goes to sleep waiting for response)
>>>>
>>>> 2. mariadb processes the query and sends back the response
>>>>
>>>> 3. pdns processes the response, then sends the next query to mariadb
>>>>
>>>> etc.
>>>>
>>>> Without overlapping requests, pdns and mariadb will never be working at
>> the
>>>> same time.
>>>>
>>>> _______________________________________________
>>>> Pdns-users mailing list
>>>> Pdns-users at mailman.powerdns.com
>>>> https://mailman.powerdns.com/mailman/listinfo/pdns-users
>>>
>>> Additionally, the master/slave work is done in a single thread. That
>>> is generally good, since the other threads should be busy serving
>>> requests. If you have a setup where there are little requests need to
>>> be served, oh well, making the master/save operations multi-threaded
>>> is probably not worth the added complexity.
>>>
>>>      -Otto
>>>
>>
>> -- 
>> Warm regards
>> George A.
>> WPXHosting
>> _______________________________________________
>> Pdns-users mailing list
>> Pdns-users at mailman.powerdns.com
>> https://mailman.powerdns.com/mailman/listinfo/pdns-users
> 

-- 
Warm regards
George A.
WPXHosting