Method unpin

src/storage/buffer_manager/buffer_manager.cpp:265–268

}

void BufferManager::unpin(FileHandle& fileHandle, page_idx_t pageIdx) {
    auto pageState = fileHandle.getPageState(pageIdx);
    pageState->unlock();
}

// evicts up to 64 pages and returns the space reclaimed
uint64_t BufferManager::evictPages() {