# Buffers (The Page Nudges) These are the most common LWLocks. They occur when two elephants are trying to look at the same **[[Structures/Page|Page]]** in the Shared Buffer brain at the same time. ![[BtreeVacuum]] ![[BufferContent]] ![[BufferMapping]] ![[LogicalRepWorker]] ![[RelCacheInit]] ![[SharedTidBitmap]] ![[SharedTupleStore]]