Valid on z/OS.
Use the LUUPDONCE control option to enforce the update of the last-used statistics within the user's security file record once a day following their first successful logon. Subsequent update attempts during the same day are bypassed. This option overrides any FACILITY specific setting of the LUUPD or NOLUUPD sub-options.
This option reduces security file I/O and improves system performance by only updating last-used statistics once a day for most successful logons. Automatic Terminal Signon (ATS) and preset terminal security normally do not update last-used statistics. Last-used statistics can be activated for these logons using OPTIONS(30) at TSS startup.
All entry methods are accepted.
This control option has the following format:
LUUPDONCE(YES|NO)
(Default) All users have their last-used statistics updated once a day following their first successful logon.
The update of the last-used statistics is controlled by the FACILITY control sub-options LUUPD and NOLUUPD.
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