Talk about bang for the buck. I was just able to boost performance of a mod_perl script over 60x by changing a single line of code. This was on an apache_1.3.29/mod_perl-1.29 using MySQL 4.0.16 and running on Red Hat Linux 9. (I'm guessing that's not a very exotic combo at all :-)

Here was the problem:
$query->bind_param(1,$mailbox);

By eliminating that single line of code and incorporating the $mailbox var right in my $sql string:
select foo from from bar where mailbox = $mailbox

instead of
select foo from from bar where mailbox = ?

Has anyone seen this happen before? Is the problem specific to MySQL or general across all DBI connections? Is a bind_param call slowing your code down somewhere? Or was I just doing something The Wrong Way before?

Phil

#with bind_param
$ ab -n100 -c10 'http://127.0.0.1/run/checkmail?mailbox=test' | grep R
+equest
Requests per second:    1.23 [#/sec] (mean)

#removed bind_param
$ ab -n100 -c10 'http://127.0.0.1/run/checkmail?mailbox=test' | grep R
+equest
Requests per second:    77.77 [#/sec] (mean)

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Edited by BazB moved from Meditations to SoPW

In reply to mod_perl was hosed by a bind variable by phildog

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