http://www.perlmonks.org?node_id=618236


in reply to Can one Apache process run multiple requests simultaneously?

ganeshk, you could have AutoCommit "ON" by default and for those transactions (before), turn it off and either "commit" or "rollback" the transaction. According to Apache::DBI's doc:
... However, because a connection may have set other parameters, the h +andle is reset to its initial connection state before it is returned +for a second time.