When the QCMN subsystem is started, ten jobs for APPC signon processing are started. When two of these jobs remain, another ten are started. IF ADLJOBS is set too large, the system spends too much time starting the additional prestart jobs at the same time. Furthermore, as user applications are developed, consider using prestart jobs to reduce program start request start-up processing. Refer to Work Management Guide , SC41-5306; APPC Programming , SC41-5443; and AS/400 Client Access Host Servers , SC41-5740, for further information on communication prestart jobs. 12.4.10 Client Access Mode Descriptions If you use Client Access/400, QPCSUPP, and QSERVER modes are required to be available. If the modes are deleted, error messages in the QSYSOPR message queue indicate the modes are missing on the source AS/400 system, with a CPI5970 message which indicates: session maximum not established for mode &2 device &1 On the target AS/400 system, it issues the message CPF594C, which indicates: Mode &1 specified for remote location &2 is not configured Any new attempts to connect with Client Access fail until the mode is recreated. Do not delete these modes! The typical scenario is for users to delete the configuration object when displaying the status from the WRKCFGSTS display--a common request, but a dangerous result. 12.4.11 Job Log Considerations Job log generation can impact system performance during error recovery,