The following Top Secret message was received:
TSS0963E SHARED PROFILE TABLE > 65% FULL - JOB NDM (PRIVATE)
Is this something you need to worry about? How serious is this?
Release : 16.0
The shared profile table is a storage area reserved in TSS multi-user address spaces to store TYPE=PROFILE acids at signon as a common pool for the address space. The table is located in Extended Private.
The shared profile table is built at startup of the region. Each entry in the table is 16 bytes long and contains:
- Profile ACID ID
- Number of users sharing the profile
- Profile address
- Change indicator
The profile ACID IDs are the profiles attached to the users that signon to the region. When the same profile is attached to multiple users, only 1 copy of the profile is loaded into the address space and shared by the users signed on that are attached to it.
65% is only about 2/3 full. If it gets over 80% or you are going to add a number of new profiles to the users that signon to this region, then you should consider increasing PRFT. (Each increment in the PRFT value holds 256 entries in the table.) If you increase PRFT, the region has to be recycled in order pick up the change.
Even if the shared profile table fills up, it won't prevent anyone from signing on. When the shared profile percentage reaches 100%, the address space must read new profiles into the private SECREC for newly signed on users. This causes additional security file I/O during signon and may reduce the efficiency of TSS for this address space.