[Pdns-users] PDNS Recursor on Debian / Low performance !!!URGENT!!!!

[Patrick Domack]

I'm not having this issue, can't seem to reproduce it on my system.

Stock ubuntu 10.04, with powerdns recursor 3.3 installed, running in  
vmware esxi
added ulimit -n 30000

dnsperf -q 4000 -l 120 -d 3million.dump

Statistics:

   Parse input file:     multiple times
   Run time limit:       120 seconds
   Ran through file:     0 times

   Queries sent:         2999750 queries
   Queries completed:    2923119 queries
   Queries lost:         76631 queries

   Avg request size:     52 bytes
   Avg response size:    83 bytes

   Percentage completed:  97.45%
   Percentage lost:        2.55%

   Started at:           Sun Feb  6 08:55:24 2011
   Finished at:          Sun Feb  6 08:57:29 2011
   Ran for:              125.182963 seconds

   Queries per second:   23350.773380 qps


Quoting Maroon Ibrahim <maroon_ibrahim at hotmail.com>:

>
> Dear PDNS Admins/Users
> I have installed PDNS Recursor on Debian Lenny 64-bit with kernel  
> 2.6.32 (downloaded the PDNS Recursore .deb from www.powerdns.com  
> webpage) and install it using dpkg -i pdn_recursor_3.3.deb
> As for the setup, all went fine so far !!!
> But i ran queryperf -q 4000 -d queries (3million record) -l 120 and  
> I noticed lots of query timed out and ended up with a very bad  
> result almost 143 qps !!!!
> [Timeout] Query timed out: msg id 1010[Timeout] Query timed out: msg  
> id 1012[Timeout] Query timed out: msg id 1013[Timeout] Query timed  
> out: msg id 1014[Timeout] Query timed out: msg id 1015[Timeout]  
> Query timed out: msg id 1017[Timeout] Query timed out: msg id  
> 1018[Timeout] Query timed out: msg id 1019[Timeout] Query timed out:  
> msg id 1021[Timeout] Query timed out: msg id 1022[Timeout] Query  
> timed out: msg id 1023[Timeout] Query timed out: msg id  
> 1024[Timeout] Query timed out: msg id 1025[Timeout] Query timed out:  
> msg id 1026[Timeout] Query timed out: msg id 1027  Run time limit:    
>     30 seconds  Ran through file:     0 times
>   Queries sent:         44497 queries  Queries completed:    6043  
> queries  Queries lost:         38454 queries  Queries delayed(?):    
> 0 queries
>   RTT max:              12.458861 sec  RTT min:               
> 0.000017 sec  RTT average:          0.838212 sec  RTT std deviation:  
>    1.222863 sec  RTT out of range:     164 queries
>   Percentage completed:  13.58%  Percentage lost:       86.42%
>   Started at:           Sun Feb  6 09:19:55 2011  Finished at:        
>    Sun Feb  6 09:20:40 2011  Ran for:              44.780163 seconds
>   Queries per second:   134.948147 qps
> DNS:/bind9/contrib/queryperf#
>
> Do I need to fine tune the kernel? or is there any tweaks in  
> powerdns recursor i have missed ? do you recommend to manually  
> compile powerdns recusor?? please advise
> it is really urgent
> Thank you for your cooperation
>
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