1 files changed, 6 insertions, 0 deletions
diff --git a/UPGRADING b/UPGRADING
index 0928819240..f2dd1060d9 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -490,6 +490,12 @@ JSON:
  Curl:
   . libcurl >= 7.15.5 is now required.
 
+ DBA:
+   . As of PHP 7.3.14, dba_open() accepts a fifth optional parameter for lmdb
+     databases which allows to specify the mapsize. The parameter defaults to
+     zero, in which case the compiled in default mapsize (usually 1048576) will
+     be used. The mapsize should be a multiple of the page size of the OS.
+
  Filter:
   . FILTER_VALIDATE_FLOAT now also supports a `thousand` option, which
     defines the set of allowed thousand separator chars.  The default (`"',."`)