Dennis Haney wrote: >>The bias in the test is even a little slanted towards the JSP >>benchmarks since the trivial connection pooling I used there is >>nothing like the Apache::DBI overhead in the mod_perl test, when I >>could have just used a persistent global $dbh instead. ( maybe I >>should? ) > > > I believe you should. It is the most common setup using mod_perl, if > you are concerned about performance, anyway.
I think you got confused by the wording. The most common setup with mod_perl is to use Apache::DBI, which is what he used in the test. To answer the original question, I don't think Apache::DBI is much overhead at all. It amounts to little more than a hash lookup. Certainly less work than the the thread synchronization required for connection pooling. - Perrin
