mdb_env(3)

💖 mdb_env — Environment Flags 💖

okay bestie, welcome to the LMDB girlies' corner of the manual pages 💅 this is mdb_env(3), from the Library Functions Manual, and it's literally just the whole roster of environment flags. no cap, that's the entire vibe.

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✨ NAME ✨

mdb_env — Environment Flags 🎀

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🌸 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

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🦋 Detailed Description 🦋

so like… there's no extra prose here, bestie 🙈 the flags below are the whole story. scroll down, the lore is in the macros 💜

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👑 Macro Definition Documentation 👑

🌟 #define MDB_FIXEDMAP 0x01

mmap at a fixed address — and this one is experimental, so treat it like a situationship, not a marriage 😭✨

🌈 #define MDB_NOSUBDIR 0x4000

no environment directory. she's directory-less and thriving 💅

⭐ #define MDB_NOSYNC 0x10000

don't fsync after commit. living dangerously, iconic behaviour 🔥

🎀 #define MDB_RDONLY 0x20000

read only. look, don't touch, periodt 👑

💜 #define MDB_NOMETASYNC 0x40000

don't fsync the metapage after commit. yeah, just the metapage gets to skip the sync, the rest still has to show up 😌

🍓 #define MDB_WRITEMAP 0x80000

use writable mmap 🦋

🧚 #define MDB_MAPASYNC 0x100000

use asynchronous msync when MDB_WRITEMAP is used ✨ (so yes, it's giving "I only exist when my friend MDB_WRITEMAP is around" 💀)

🌸 #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 — the caller must manage their own locks. not me handing you the keys and walking away 🙈

🌟 #define MDB_NORDAHEAD 0x800000

don't do readahead — and heads up, this has no effect on Windows 💅

💫 #define MDB_NOMEMINIT 0x1000000

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

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🫶 Author 🫶

Generated automatically by Doxygen for LMDB from the source code. she didn't write herself, she was born this way ✨

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and that's the whole page, bestie 💖 thanks for reading the mdb_env(3) manual page from LMDB — mwah, slay, go touch some flags 💅🌈⭐