The database property / "User details" (the table with adds/reads/writes/updates, timestamp and ID) is a limited table which starts overwriting if there are too many entries. On heavily used databases, this table can start overwriting very soon, even within few hours only. At the same time, this User Details/Activity table is basically the most efficient way how to "audit" a database as it contains all access data independent from protocol used - it logs data of IDs coming from Notes client / servers / web access / LDAP, POP3, IMAP, simply everything.
There are Domino customers, that use this User Details table, extract it to another storage and preserve these details as required by the company or legal. This extraction on some highly used databases and servers then needs to be scheduled to run very often not to lose a single line from this table.
In some of the future ODS versions, could you please make this table larger - so it can keep many more lines and starts to overwrite much later?