[mrtg] Slow execution of MRTG (Windows 2000, AcitvePerl, locales)

[Stojan Rancic]

Hello
We're having a very strange problem on one of our servers. It's a Windows 
2000 (Microsoft Windows 2000 [Version 5.00.2195]) server , running 
ActivePerl 5.8.3 build 809 and the latest mrtg (2.11.1). 

We have a config file which polls a few routers and it has a line 
"Language: Slovenian" in it. When I run that via the ActivePerl profiler 
(perl -d:DPerf mrtg test.cfg), I get these stats out:

Total Elapsed Time = -0.26879 Seconds
  User+System Time = 20.50149 Seconds
Exclusive Times
%Time ExclSec CumulS #Calls sec/call Csec/c  Name
 85.0   17.42 17.395  12936   0.0013 0.0013  locales_mrtg::slovenian
 6.24   1.279  1.418     98   0.0131 0.0145  main::writegraphics
 3.13   0.642 18.255     98   0.0066 0.1863  main::writehtml
 1.22   0.250 13.733   2100   0.0001 0.0065  main::fmi
 0.59   0.120  0.120     98   0.0012 0.0012  main::imggen
 0.54   0.110  0.338     11   0.0100 0.0307  main::BEGIN
 0.49   0.101  0.099    105   0.0010 0.0009  SNMPv1_Session::send_query
 0.29   0.060  0.059    105   0.0006 0.0006 
SNMP_Session::wait_for_response
 0.29   0.060  0.129      7   0.0086 0.0184  SNMP_util::BEGIN
 0.29   0.060  0.523     98   0.0006 0.0053  main::getsnmparg
 0.25   0.051  0.057      1   0.0514 0.0569  MRTG_lib::readcfg
 0.24   0.050  0.050     42   0.0012 0.0012  IO::Socket::INET::_sock_info
 0.24   0.050  0.050     98   0.0005 0.0005  main::getcurrent
 0.24   0.050  0.179      4   0.0125 0.0447  MRTG_lib::BEGIN
 0.24   0.050  0.076    490   0.0001 0.0002  BER::decode_by_template_2

.. if I comment out the Language line, the figures change considerably:

Total Elapsed Time = -0.35801 Seconds
  User+System Time = 1.797087 Seconds
Exclusive Times
%Time ExclSec CumulS #Calls sec/call Csec/c  Name
 42.8   0.770  0.858     98   0.0079 0.0088  main::writegraphics
 16.2   0.292  0.428     98   0.0030 0.0044  main::writehtml
 10.5   0.190  0.144   2100   0.0001 0.0001  main::fmi
 4.95   0.089  0.099      1   0.0885 0.0992  MRTG_lib::readcfg
 4.45   0.080  0.080     42   0.0019 0.0019  IO::Socket::INET::_sock_info
 4.45   0.080  0.080     98   0.0008 0.0008  main::imggen
 4.45   0.080  0.267     11   0.0073 0.0243  main::BEGIN
 3.95   0.071  0.069    101   0.0007 0.0007  SNMPv1_Session::send_query
 3.34   0.060  0.008  12936   0.0000 0.0000  locales_mrtg::english
 2.78   0.050  0.059      6   0.0083 0.0099  FindBin::BEGIN
 2.23   0.040  0.055    490   0.0001 0.0001  BER::decode_by_template_2
 1.67   0.030  0.030     21   0.0014 0.0014  IO::Socket::socket
 1.67   0.030  0.006   1960   0.0000 0.0000  BER::decode_length
 1.67   0.030  0.078      7   0.0043 0.0112  SNMP_util::BEGIN
 1.67   0.030  0.030     20   0.0015 0.0015  SNMPv1_Session::close

.. as you can see, the runtimes are almost 10 times faster and the whole 
machine is quite more responsive (in the first case, the load goes up to 
100% and stays there for a while..)

The default language settings on the server are English/US.

Any ideas on why this is happening or where to look for the problem ? Is 
this actually a MRTG problem or an ActivePerl problem? Any ideas welcome.

Stojan Rancic
Inzenir v podpori strankam
Customer Support Engineer

NIL Data Communications,  Tivolska cesta 48,  1000 Ljubljana,  Slovenia
Phone +386 1 4746 500     Fax +386 1 4746 501     http://www.NIL.si


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