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From Alx G <glub...@yahoo.co.uk>
Subject Re: Apache::DProf giving empty tmon.out files
Date Mon, 21 Jan 2008 12:26:45 GMT



John ORourke wrote:
> 
> Alx G wrote:
>> I'm running Apache 2.2.3, the conf has the following in it:
>>
>> --
>> ...
>> LoadModule perl_module modules/mod_perl.so
>>
>> # Perl profiler
>> #
>> #<Perl>
>> #    require Apache::DB;
>> #    Apache::DB->init;
>> #</Perl>
>> PerlModule Apache::DProf
>> ...
>> --
>>
>> I tried with and without the commented stuff - as was suggested in this
>> thread.
>>   
> 
> I'm running prefork and have used DProf many times.  I even wrote a 
> script to merge multiple tmon.out files, so you can see how your app is 
> doing in its normal environment.
> 
> The lack of recording happens when you don't do Apache::DB->init, and 
> you also need to explicitly create the 'dprof' directory in your apache 
> log directory, and make the apache user own it.
> 
> ----------------------- perl config include:
> <Perl>
>     require Apache::DB;
>     Apache::DB->init; # required otherwise very few subroutine calls get 
> captured
> </Perl>
> PerlModule Apache::DProf
> 
> ----------------------- files:
> (replace /var/log/httpd with your main log file path)
> 
> /var/log/httpd/dprof/   ********** you have to explicitly create this, 
> and make it owned by the apache user
> 
> /var/log/httpd/dprof/PID/tmon.out   <----- output from a particular 
> process (where PID is the pid)
> 
> -----------------
> Once you've let it run and made a few requests (make lots of requests so 
> any heavy startup code doesn't overshadow the real results, and so each 
> process gets a go), merge the tmon.out files using this script:
> 
> http://www.versatilia.com/downloads/merge-tmon-out.pl
> 
> (see top of file for usage)
> 
> hope that helps,
> John
> 
> 

Thanks for the tips John, however as I mentioned in my previous post, I did
in fact try it with the DB->init call and it made no difference. Also, the
tmon.out files *are* being created by the apache process so that's not an
issue either.

-- 
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