If the default QOP settings do not meet site needs, you can edit the TdgssUserConfigFile.xml to change the settings.
Changing the TDGSS configuration requires a tpareset, during which the database is temporarily unavailable. Make all QOP changes, and any other needed TDGSS configuration changes, at the same time so they can all be included in a single run of the run_tdgssconfig tool and the tpareset utility. See Changing the TDGSS Configuration.