Hi Jacob.

Tx for your answer. I got OpGuide.pdf, but it says it happens when accessing the linux server from Windows and I'm using only Linux clients. Also my Kernel is 2.4.20-8.

I also guess this is not the problem, because ran the test locally (both on RedHat and on XP) to avoid network interference.

Thanks again.

Luciano Enzweiler

----- Original Message -----
From: Jacob Alberty
To: firebird-support@yahoogroups.com
Sent: Monday, March 22, 2004 3:31 PM
Subject: Re: [firebird-support] Firebird on Linux 300% slower than XP???


what linux kernel are you using? according to the firebird docs windows
clients accessing a linux server are 1/3rd the speed of using a windows
NT server, it has to do with the "nagle" algorithm see page 252 of
OpGuide.pdf from the interbase 6 documentation (ibphoenix.com has a copy
somewhere) there is a fix for classic server, dont know what to do about
superserver tho, i suspect a more recent kernel (2.4 or 2.6) will fix
this however.
Alexandre Benson Smith wrote:

> At 19:51 20/03/2004 -0300, you wrote:
>
> >I must be doing something wrong, but I can't figure out what. I'll
> >describe the problem shortly and then more detailed.
> >
>
> ...snip...
>
> Ola Luciono,
>
> How are you connecting the test program run on local machine ? What is
> the
> conection string for both servers... Did you test the name resolution
> (DNS
> problem ?)
>
> >Here is an sample of the code I used to make the test (I also used a lot
> >of others, with the same result)
> >
> >
>
> Here I must missed something...
>
>
> >**********START********
> >
> > qryGeral1.SQL.Clear;
> >
> > qryGeral1.SQL.Add('SELECT C.CDCLIENTE, C.NOME FROM CLIENTE C WHERE
> > C.CDCLIENTE = :CDCLIENTE');
>
> qryGeral1.Prepare;
>
> >
> >
> > Alt := False;
> > for K := 1 to 1000 do begin
> >
> > if Alt then begin
> >
> > qryGeral1.Params.ParamByName('CDCLIENTE').AsInteger := 153;
> > end else begin
> >
> > qryGeral1.Params.ParamByName('CDCLIENTE').AsInteger := 1485;
> > end;
> > Alt := not Alt;
> > qryGeral1.Params.ParamByName('CDCLIENTE').AsInteger := 153;
>
> What is this line for ??? Here you just nullify the alternance given
> by the
> "if"... You just open every time with CDCliente = 153
>
>
> > qryGeral1.Close;
> >
> > GetStartTime; // --- Here is a function where I start to count
> the time
>
> I think this line should be before the loop
>
> > qryGeral1.Open;
> >
> > GetEndTime; // --- The end. So I know how long it took to
> execute
> > this line 1000 times.
>
> I think this line should be outside the loop
>
> > end;
> >
> >**********END*******
>
>
> I the code you run is not this one right ? or you will get wrong
> results...
> I think you have something similar to this:
>
> **********START********
>
>
> qryGeral1.SQL.Clear;
>
>
> qryGeral1.SQL.Add('SELECT C.CDCLIENTE, C.NOME FROM CLIENTE C WHERE
> C.CDCLIENTE = :CDCLIENTE');
> qryGeral1.Prepare;
>
> Alt := False;
>
> GetStartTime; // --- Here is a function where I start to count the time
>
> for K := 1 to 1000 do begin
>
> if Alt then begin
> qryGeral1.Params.ParamByName('CDCLIENTE').AsInteger := 153;
> end else begin
> qryGeral1.Params.ParamByName('CDCLIENTE').AsInteger := 1485;
> end;
> Alt := not Alt;
>
>
> qryGeral1.Open;
>
> qryGeral1.Close;
> end;
>
> GetEndTime; // --- The end. So I know how long it took to execute this
> line 1000 times.
>
>
> **********END*******
>
>
> >
> >
> >Most of the tests took between 0.5 and 2 seconds, with enough time to
> have
> >a good comparison. I also tested the same software on Win98 (around
> twice
> >slower than XP, but yet faster than Linux) and with Linux Conectiva 9
> >(with the same results as Red Hat 8). As I made the tests several times
> >and in many different ways trying to isolate the DB part, I guess there
> >isn't anything wrong with this conclusion.
> >
>
> Did you tried to isolate some parts ? The connection Time for example:
>
> Did you tried with other component set ? FIBPlus, IBO, etc...
>
> Did you find any network problems (a bad NIC ?)
>
> >
> >
> >I just hope that I'm missing a configuration or something to make it
> >faster. I really don't feel like installing the DB server on XP on a
> >customer I just installed the server and all clients with
> >Linux :-) Please help me!!! :-)
> >
> >
> >
> >Thanks you all.
>
> More questions than answers this time...
>
> I did the same tests here at my office...
>
> the results accessing the database on my notebook running WinXP is a
> little
> bit slower then what I got accessing my server running RedHat Linux
> 8... My
> Notebook is a faster machine and has more memory than my linux server,
> so I
> could bet Linux will run better on the same hardware ;-)
>
> The test client program runs from another machine running Win2000
> connecting using the following string:
> "192.168.1.1:my_db" -> to my server
> "192.168.1.199:my_db" -> to my notebook
>
> Both are running Firebird SS 1.5 final version.
>
>
>
> >Luciano Enzweiler
>
>
> um abraco !
>
>
> Alexandre Benson Smith
> Development
> THOR Software e Comercial Ltda.
> Santo Andre - Sao Paulo - Brazil
> www.thorsoftware.com.br
>
> ----------
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> <http://www.grisoft.com%29.>
> Version: 6.0.631 / Virus Database: 404 - Release Date: 17/03/2004
>


------------------------------------------------------------------------------
Yahoo! Groups Links

a.. To visit your group on the web, go to:
http://groups.yahoo.com/group/firebird-support/

b.. To unsubscribe from this group, send an email to:
firebird-support-unsubscribe@yahoogroups.com

c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.



[Non-text portions of this message have been removed]