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From Jan Banan...@grabbarna.nu>
Subject RE: [users@httpd] Count in SSI
Date Tue, 01 Apr 2003 09:39:20 GMT
Just one thought... how do I know that mod_perl is being used? The Apache 
server identifies itself by

    Server: Apache/1.3.27 (Unix) mod_perl/1.27

Maybe I need to do something more than just having the filname like
index.cgi and start it with "#!/usr/local/bin/perl" ?

/Jan

On Tue, 1 Apr 2003, Jan Banan wrote:

> I tested by rewriting my index.shtml into a cgi-script (index.cgi) and the 
> result is exactly the same... the client requests a new page as soon as 
> possible after it has received the previos page and it takes about 4-5 
> secs between each page. 
> 
> When using a simple index.shtml with no perl-calls it takes no more than 
> one second, so there seem to be no problem with SSI, the problem seem to 
> be that apache 1.3.27 takes seconds to start/stop executing a perl-script 
> with mod_perl/1.27.
> 
> Any suggestions of how to fasten this up are very welcome!!
> 
> /Jan
> 
> On Tue, 1 Apr 2003, Jan Banan wrote:
> 
> > I am using modperl: Server: Apache/1.3.27 (Unix) PHP/4.2.3 mod_perl/1.27
> > I rewrote the perl-script like this:
> > 
> >    #!/usr/local/bin/perl
> >    use Time::HiRes qw(gettimeofday tv_interval);
> >    $t0 = [gettimeofday];
> >    ($sec, $min, $hour)=localtime(time-2);
> >    $year += 1900;
> >    $mon++;
> >    print "Content-Type: text/plain\n\n";
> >    print (sprintf ("%.2d%.2d%.2d", $hour, $min, $sec));
> >    $t1 = [gettimeofday];
> >    $t0_t1 = tv_interval $t0, $t1;
> >    print STDERR "Time diff: $t0_t1\n";
> > 
> > This is the time diffs I get in Apache error_log:
> > 
> >   Time diff: 0.000337
> >   Time diff: 0.000339
> >   Time diff: 0.000348
> >   Time diff: 0.000366
> >   Time diff: 0.000333
> > 
> > So the perl-script seem to execute really fast. But what may take time is 
> > the SSI line:
> >    <!--#include virtual="/cgi-bin/slow_clock.pl" -->
> > because the client webbrowser is sending a GET every second but it only 
> > receives a result every 4-5 second.
> > If I change the SSI line to
> >    <!--#config timefmt="%H%M%S" --><!--#echo var="DATE_LOCAL" -->
> > (so I am not able to slow the clock my 2 secs) then the client get a 
> > respons each second (as I want).
> > 
> > So either there seem to be something really slow with SSI
> >    <!--#include virtual="/cgi-bin/slow_clock.pl" -->
> > or for Apache to start/stop using Perl.
> > 
> > Any suggestions are very welcome!!
> > 
> > /Jan
> > 
> > On 31 Mar 2003, Garth Winter Webb wrote:
> > 
> > > Are you running mod_perl?  A request to this CGI should definitely not
> > > take a few seconds.  It shouldn't even take a second.  The speed of your
> > > machine is not at issue here.  I've got a PII 300MHz machine serving
> > > content from multiple scripts that do way more than this one and the
> > > response is less than a second.
> > > 
> > > Use mod_perl if you not already.  You could load Time::HiRes from your
> > > script, record the time at the beginning and at the end and write the
> > > difference to STDERR which you can pick up in your log file.  By using
> > > mod_perl you won't incur a hit for loading Time::HiRes (or Perl, or any
> > > module it uses for that matter) after the first hit.  This will tell you
> > > how much time is being spent running your script.
> > > 
> > > G
> > > 
> > > On Mon, 2003-03-31 at 09:17, Jan Banan wrote:
> > > > > You have to call an external program which may be in CGI, e.g.
> > > > >         <!--#include virtual="/cgi-bin/slow_clock.pl" -->
> > > > > where slow_clock.pl always returns the time of two seconds ago.
> > > > 
> > > > I did that by creating the following /cgi-bin/slow_clock.pl :
> > > > 
> > > >    #!/usr/local/bin/perl
> > > >    print "Content-Type: text/plain\n\n";
> > > >    ($sec, $min, $hour)=localtime(time-2);
> > > >    print (sprintf ("%.2d%.2d%.2d", $hour, $min, $sec));
> > > > 
> > > > The problem is that this is extremely slow. I like the user to be able
to 
> > > > send/receive a GET every second, but each request takes a few seconds
to 
> > > > execute on this 550 MHz Pentium III running RedHat Linux 7.2 and Apache

> > > > 1.3.27 :-( 
> > > > Probably I need to buy a faster computer... or just put the clock back

> > > > two seconds, hrm.
> > > > 
> > > > /JB
> > > > 
> > > > 
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> > 
> > 
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> > 
> 
> 
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> 


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