Changes in 12.0 work to reduce lock delays in the Buffer Hash Table. Enhancements to small table scans enable find next operations to reference the index block last visited in the buffer pool without the need for hash table lookups, while the Buffer Hash Latch Factor parameter (-hashLatchFactor) enables database administrators to tailor the number of latches allocated for the Buffer pool Hash Table (BHT) entries.

See Buffer Hash Latch Factor (-hashLatchFactor).