Record type 39 is written by NetView's network logical data manager (NLDM) component. NLDM writes to the external log if the response time data function (RTM) or the network accounting and availability measurement function is active.
The response time data function writes record type 39 when the COLLECT command with the LOG parameter is issued or at session end for an logical unit (LU) attached to a 3274 with the RTM feature.
The network accounting and availability measurement data function writes record type 39 when a session is started, a session ends, or when a RECORD command with the SESSTATS parameter is issued.
For more information, see NetView Administration Reference.