Does the Overview Report include timings for failed Transactions?
In the Overview report, the Overall Response Time section is divided into successful (OK) and failed transactions:
The values stated in the times for the Trans. ok and Trans.(busy) ok will only include the times for the successful transactions.
The values stated for Trans. failed and Trans.(busy) failed, will only include the times for the unsuccessful transactions. Transaction time is reported in this measure type if at least one error of severity “error” or higher occurs within the transaction.
See "Measurements" in help for full details.