NAME

       mdb_env - Environment Flags

SYNOPSIS

   Macros
       #define MDB_FIXEDMAP   0x01
       #define MDB_NOSUBDIR   0x4000
       #define MDB_NOSYNC   0x10000
       #define MDB_RDONLY   0x20000
       #define MDB_NOMETASYNC   0x40000
       #define MDB_WRITEMAP   0x80000
       #define MDB_MAPASYNC   0x100000
       #define MDB_NOTLS   0x200000
       #define MDB_NOLOCK   0x400000
       #define MDB_NORDAHEAD   0x800000
       #define MDB_NOMEMINIT   0x1000000

Detailed Description

Macro Definition Documentation

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

   #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

Author

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