Large profiles

Large profiles can degrade performance in the following ways:

When RACF® brings a profile into storage, a large profile takes up a significant portion of the in-storage buffer. As a result, the rate of I/O to the RACF database increases.
If an update to a profile causes the profile to require an additional block in the RACF database, the larger the profile's size the further RACF is likely to have to go in the database to find enough contiguous blocks for the updated profile, increasing the distance between the profile and its index block. As a result, searches for the profile become longer and longer as you update the profile. In addition, the database becomes more fragmented, requiring that you run the IRRUT400 utility more often to reorganize it.