Tweak MDB restrictions

diff --git a/libraries/libmdb/mdb.h b/libraries/libmdb/mdb.h
index 1272630787647be25e8a2824d095cec05b5200cb..8ded7374c08044ee4a5fbd9b73d149830c0f1d5b 100644 (file)
--- a/libraries/libmdb/mdb.h
+++ b/libraries/libmdb/mdb.h
@@ -87,8 +87,10 @@
  *     - If you do that anyway, close the environment once in a while,
  *       so the lockfile can get reset.
  *
- *     - Do not use MDB databases on remote filesystems.  This breaks
- *       flock() on some OSes, even between two processes on the same host.
+ *     - Do not use MDB databases on remote filesystems, even between
+ *       processes on the same host.  This breaks flock() on some OSes,
+ *       possibly memory map sync, and certainly sync between programs
+ *       on different hosts.
  *
  *     - Opening a database can fail if another process is opening or
  *       closing it at exactly the same time.