A system includes an associative memory, a first table, a second table, a comparator, and an updater. The associative memory may include data and associations among data and may be built from the first table. The first table may include a record with a first and second field. The associative memory may be configured to ingest the first field and avoid ingesting the second field. The second table may include a record with a third field storing information indicating whether the first field has been ingested by the associative memory or has been forgotten by the associative memory. The comparator may be configured to compare the first and second table to identify one of whether the first field should be forgotten or ingested by the associative memory. The updater may be configured to update the associative memory by performing one of ingesting or forgetting the first field.