Detailed Description

Macro Definition Documentation

#define MDB_FIXEDMAP 0x01

mmap at a fixed address (experimental)

#define MDB_ENCRYPT 0x2000U

encrypted DB - read-only flag, set by mdb_env_set_encrypt()

#define MDB_NOSUBDIR 0x4000

no environment directory

#define MDB_NOSYNC 0x10000

don't fsync after commit

#define MDB_RDONLY 0x20000

read only

#define MDB_NOMETASYNC 0x40000

don't fsync metapage after commit

#define MDB_WRITEMAP 0x80000

use writable mmap

#define MDB_MAPASYNC 0x100000

use asynchronous msync when MDB_WRITEMAP is used

#define MDB_NOTLS 0x200000

tie reader locktable slots to MDB_txn objects instead of to threads

#define MDB_NOLOCK 0x400000

don't do any locking, caller must manage their own locks

#define MDB_NORDAHEAD 0x800000

don't do readahead (no effect on Windows)

#define MDB_NOMEMINIT 0x1000000

don't initialize malloc'd memory before writing to datafile

#define MDB_PREVSNAPSHOT 0x2000000

use the previous snapshot rather than the latest one

#define MDB_REMAP_CHUNKS 0x4000000

don't use a single mmap, remap individual chunks (needs MDB_RPAGE_CACHE)