[Pdns-users] PDNS Authoritative and Mariadb share single core but multiple available
otto at drijf.net
Thu Oct 31 15:16:11 UTC 2019
On Thu, Oct 31, 2019 at 05:08:50PM +0200, George Asenov wrote:
> Here is a dnsperf test
> # dnsperf -s XXX.XXX.XXX.XXX -c 10000 -T 5 -d domainslist.txt -n 100
> DNS Performance Testing Tool
> Nominum Version 22.214.171.124
> [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)
> 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
If you want to talk about general performance (measurement) start a new
> 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
> >> same time.
> >> _______________________________________________
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> >> 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.
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> Pdns-users at mailman.powerdns.com
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