db_defs.h

DB_DEF_BUFFER_COUNT DB_DEF_CHECKPOINT_INTERVAL DB_DEF_FLUSH_BUFFERS DB_DEF_PAGE_SIZE DB_DEF_PREALLOCATE_PAGES DB_MAX_BUFFER_COUNT DB_MAX_CHECKPOINT_INTERVAL DB_MAX_PAGE_SIZE DB_MAX_PREALLOCATE_PAGES DB_MIN_BUFFER_COUNT DB_MIN_CHECKPOINT_INTERVAL DB_MIN_FLUSH_BUFFERS DB_MIN_PAGE_SIZE DB_MIN_PREALLOCATE_PAGES

#define DB_MAX_PREALLOCATE_PAGES   128 Maximum number of pages to preallocate for the journal. See also: StorageMode::preallocate, db_file_storage_config_t::preallocate.