Collaboration diagram for Environment Flags:

Macros
#define	MDB_FIXEDMAP 0x01
	mmap at a fixed address (experimental) More...

#define	MDB_FIXEDMAP 0x01
	mmap at a fixed address (experimental) More...

#define	MDB_NOSUBDIR 0x4000
	no environment directory More...

#define	MDB_NOSUBDIR 0x4000
	no environment directory More...

#define	MDB_NOSYNC 0x10000
	don't fsync after commit More...

#define	MDB_NOSYNC 0x10000
	don't fsync after commit More...

#define	MDB_RDONLY 0x20000
	read only More...

#define	MDB_RDONLY 0x20000
	read only More...

#define	MDB_NOMETASYNC 0x40000
	don't fsync metapage after commit More...

#define	MDB_NOMETASYNC 0x40000
	don't fsync metapage after commit More...

#define	MDB_WRITEMAP 0x80000
	use writable mmap More...

#define	MDB_WRITEMAP 0x80000
	use writable mmap More...

#define	MDB_MAPASYNC 0x100000
	use asynchronous msync when MDB_WRITEMAP is used More...

#define	MDB_MAPASYNC 0x100000
	use asynchronous msync when MDB_WRITEMAP is used More...

#define	MDB_NOTLS 0x200000
	tie reader locktable slots to MDB_txn objects instead of to threads More...

#define	MDB_NOTLS 0x200000
	tie reader locktable slots to MDB_txn objects instead of to threads More...

#define	MDB_NOLOCK 0x400000
	don't do any locking, caller must manage their own locks More...

#define	MDB_NOLOCK 0x400000
	don't do any locking, caller must manage their own locks More...

#define	MDB_NORDAHEAD 0x800000
	don't do readahead (no effect on Windows) More...

#define	MDB_NORDAHEAD 0x800000
	don't do readahead (no effect on Windows) More...

#define	MDB_NOMEMINIT 0x1000000
	don't initialize malloc'd memory before writing to datafile More...

#define	MDB_NOMEMINIT 0x1000000
	don't initialize malloc'd memory before writing to datafile More...

Detailed Description

Macro Definition Documentation

◆ MDB_FIXEDMAP [1/2]

#define MDB_FIXEDMAP 0x01

mmap at a fixed address (experimental)

Definition at line 285 of file lmdb.h.

◆ MDB_FIXEDMAP [2/2]

#define MDB_FIXEDMAP 0x01

mmap at a fixed address (experimental)

Definition at line 285 of file lmdb.h.

◆ MDB_MAPASYNC [1/2]

#define MDB_MAPASYNC 0x100000

use asynchronous msync when MDB_WRITEMAP is used

Definition at line 297 of file lmdb.h.

◆ MDB_MAPASYNC [2/2]

#define MDB_MAPASYNC 0x100000

use asynchronous msync when MDB_WRITEMAP is used

Definition at line 297 of file lmdb.h.

◆ MDB_NOLOCK [1/2]

#define MDB_NOLOCK 0x400000

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

Definition at line 301 of file lmdb.h.

◆ MDB_NOLOCK [2/2]

#define MDB_NOLOCK 0x400000

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

Definition at line 301 of file lmdb.h.

◆ MDB_NOMEMINIT [1/2]

#define MDB_NOMEMINIT 0x1000000

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

Definition at line 305 of file lmdb.h.

◆ MDB_NOMEMINIT [2/2]

#define MDB_NOMEMINIT 0x1000000

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

Definition at line 305 of file lmdb.h.

◆ MDB_NOMETASYNC [1/2]

#define MDB_NOMETASYNC 0x40000

don't fsync metapage after commit

Definition at line 293 of file lmdb.h.

◆ MDB_NOMETASYNC [2/2]

#define MDB_NOMETASYNC 0x40000

don't fsync metapage after commit

Definition at line 293 of file lmdb.h.

◆ MDB_NORDAHEAD [1/2]

#define MDB_NORDAHEAD 0x800000

don't do readahead (no effect on Windows)

Definition at line 303 of file lmdb.h.

◆ MDB_NORDAHEAD [2/2]

#define MDB_NORDAHEAD 0x800000

don't do readahead (no effect on Windows)

Definition at line 303 of file lmdb.h.

◆ MDB_NOSUBDIR [1/2]

#define MDB_NOSUBDIR 0x4000

no environment directory

Definition at line 287 of file lmdb.h.

◆ MDB_NOSUBDIR [2/2]

#define MDB_NOSUBDIR 0x4000

no environment directory

Definition at line 287 of file lmdb.h.

◆ MDB_NOSYNC [1/2]

#define MDB_NOSYNC 0x10000

don't fsync after commit

Definition at line 289 of file lmdb.h.

◆ MDB_NOSYNC [2/2]

#define MDB_NOSYNC 0x10000

don't fsync after commit

Definition at line 289 of file lmdb.h.

◆ MDB_NOTLS [1/2]

#define MDB_NOTLS 0x200000

tie reader locktable slots to MDB_txn objects instead of to threads

Definition at line 299 of file lmdb.h.

◆ MDB_NOTLS [2/2]