[Pdns-users] PDNS slow

[Eugene Pefti]

I would support Alexx's statement about the overall performance. Just now
one of my nameservers died with 

"Error creating thread: Cannot allocate memory" in the log file. No dig or
host queries could return anything.

The box runs 1 GB of RAM and had about 400MB of free RAM when it died. Are
we looking into hardware or software problem?

 

Eugene

 

From: pdns-users-bounces at mailman.powerdns.com
[mailto:pdns-users-bounces at mailman.powerdns.com] On Behalf Of Alexx Vella
Sent: Monday, April 28, 2008 8:03 AM
To: pdns-users at mailman.powerdns.com
Subject: [Pdns-users] PDNS slow

 

Hi :-)


I installed pdns-static-2.9.21-1.i386.rpm on RHEL4 (2.6.9-34.0.1.ELsmp #1
SMP Wed May 17 17:05:24 EDT 2006 i686 i686 i386 GNU/Linux) together with the
test.com sample found on powerdns.com.

When I run /etc/init.d/powerdns monitor, sometimes it runs:

Apr 28 14:57:09 gmysql Connection succesful
Apr 28 14:57:09 About to create 3 backend threads for UDP
% Apr 28 14:57:09 gmysql Connection succesful
Apr 28 14:57:10 gmysql Connection succesful
Apr 28 14:57:10 gmysql Connection succesful
Apr 28 14:57:10 Done launching threads, ready to distribute questions


And sometimes it crashes on sig11:

% Apr 28 14:56:56 Got a signal 11, attempting to print trace:
Apr 28 14:56:56 [0x80cde64]
Apr 28 14:56:56 [0x829b5a8]


When it runs, sometimes it answers immediately, sometimes after seconds:

[x at x ~]$ time host test.com 127.0.0.1
Using domain server:
Name: 127.0.0.1
Address: 127.0.0.1#53
Aliases:

test.com has address 199.198.197.196

real    0m5.064s
user    0m0.002s
sys     0m0.003s



And sometimes never:

[x at x ~]$ time host test.com 127.0.0.1
;; connection timed out; no servers could be reached

real    0m10.045s
user    0m0.002s
sys     0m0.004s
[x at x ~]$


I found some things about CS, but the server is not that busy:

 2  0    144 870888  29396 773224    0    0     0     0 1199  4035 39  3 58
0
 1  0    144 871144  29396 773224    0    0     0     0 1147  3332 18  2 80
0



Since pdns seems to be able to run very well, so any suggestions what I can
do about this?


Thanks
Alexx

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