Brian Gaber wrote:
I have an AIX 5.2 (16 GB RAM), Apache 2.2.8, MySQL 5.0.51a and mod_per
2.04 environment. I had a Perl cgi-bin program using CGI.pm that I
converted to work in mod_perl. The converted script still uses CGI.pm
and is now enabled in Apache via:
PerlModule ModPerl::Registry
Alias /perl/ /usr/local/apache2/perl/
<Location /perl/>
SetHandler perl-script
PerlResponseHandler ModPerl::Registry
PerlOptions +ParseHeaders
Options +ExecCGI
Order allow,deny
Allow from all
</Location>
I have my startup.pl containing:
use Apache::DBI;
use DBI();
Called in httpd.conf with:
PerlPostConfigRequire /usr/local/apache2/scripts/startup.pl
Apache was compiled with --with-mpm=prefork
All webpages are accessed using SSL. I am investigating offloading SSL,
but that will take a few months to accomplish.
If only a few users are using the application then performance is fine.
By this I mean the display of a MySQL query to a webpage takes a few
seconds. Once we get over 20 users performance degrades to about 45
seconds.
Any tips would be appreciated.
While a good route to optimization would be to implement Apache::DProf
(http://search.cpan.org/dist/Apache-DB), a delay of 45 seconds is quite
large and I am guessing that if you enabled query timing in MySQL you
could identify the offending queries in your mysql log and start from there.
Apache::DProf is generally good at taking your request times from 5
seconds to 0.05 seconds, but given a 45 second delay on a page that runs
a database query, I'd look at your database performance first.
