适用系统版本： V4R4 V4R5
如果你打了补丁 SF62558 (V4R4) 或者 SF62559 (V4R5) ，或者更高的补丁版本，这些补丁会调整该作业的运行优先级到20。
ADDRTGE SBSD(QSYS/QSYSWRK) SEQNBR(2517) CMPVAL('TELNETD' 1)
ADDRTGE SBSD(QSYS/QSYSWRK) SEQNBR(2517) CMPVAL('QCMDI' 1)
Previous to the PTFs being applied the QTVDEVICE jobs are submitted with a compare value of QCMDI. If the performance issues occurred, the circumvention noted above was to add a Routing Entry with a compare value for QCMDI that will reference a Class with a higher run priority. A drawback to this is that other jobs, the Pass-through server for example, are submitted to the QSYSWRK subsystem with a compare value of QCMDI. So the QCMDI Routing Entry affected more than just Telnet.
Mindful of the potential side effects of the first circumvention, a unique compare value of TELNETD was added to the QTVDEVICE job submission via PTF. This allows the run priority of the Telnet QTVDEVICE jobs to be changed without affecting any other programs. A real consideration with these PTFs, which are on the current Cumulative Packages, is that if you previously had added the QCMDI Routing Entry to address this issue, and the new Routing Entry is not added, the same performance lags that were experienced before will reappear.
If you had previously added the QCMDI Routing Entry at sequence number 2517, the recommendation is to remove that Routing Entry and add the one for TELNETD at sequence number 2517. Because in future releases of OS/400 the install of TCP/IP Connectivity Utilities will add the Routing Entry for TELNETD at sequence number 2517. If you still want jobs that are submitted to the QSYSWRK subsystem with a compare value of QCMDI to run at a priority other than 50, then add that Routing Entry back at any
available sequence number.
For tuning the System performance further, the run priority can be customized by replacing the QSYSCLS20 class with a different class, either system provided or user created, that references a different run priority. And with the new PTFs applied, that change will only affect the Telnet server jobs.