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Update WRITEMAP doc

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This commit is contained in:
Howard Chu 2016-01-23 16:51:42 +00:00
parent 20dec1f69b
commit b5018e26bc
1 changed files with 4 additions and 2 deletions
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6
libraries/liblmdb/lmdb.h
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@ -545,9 +545,11 @@ int mdb_env_create(MDB_env **env);
* allowed. LMDB will still modify the lock file - except on read-only
* filesystems, where LMDB does not use locks.
* <li>#MDB_WRITEMAP
* Use a writeable memory map unless MDB_RDONLY is set. This is faster
* and uses fewer mallocs, but loses protection from application bugs
* Use a writeable memory map unless MDB_RDONLY is set. This uses
* fewer mallocs but loses protection from application bugs
* like wild pointer writes and other bad updates into the database.
* This may be slightly faster for DBs that fit entirely in RAM, but
* is slower for DBs larger than RAM.
* Incompatible with nested transactions.
* Do not mix processes with and without MDB_WRITEMAP on the same
* environment. This can defeat durability (#mdb_env_sync etc).