If log-file generation has been enabled, then any errors that are encountered in load tests are reported in log files. Log files contain a record of all the function calls that are invoked by the transactions of each virtual user in load tests. These files contain session and error information, including details for each type of event executed during a simulation, the API calls in a transaction, and the data exchanged with the server.
The process of generating log files alters the time measurements of tests. Therefore, use log files for debugging purposes only. Do not generate them for full load tests.