diff --git a/docs/api/options.rst b/docs/api/options.rst
index e5c0c1b..6ce3723 100644
--- a/docs/api/options.rst
+++ b/docs/api/options.rst
@@ -59,7 +59,7 @@ Options object
         Write operations.
 
         | *Type:* ``bool``
-        | *Default:* ``False``
+        | *Default:* ``True``
 
     .. py:attribute:: write_buffer_size
 
@@ -100,11 +100,14 @@ Options object
     .. py:attribute:: max_open_files
 
         Number of open files that can be used by the DB.  You may need to
-        increase this if your database has a large working set (budget
-        one open file per 2MB of working set).
+        increase this if your database has a large working set. Value -1 means
+        files opened are always kept open. You can estimate number of
+        files based on target_file_size_base and target_file_size_multiplier
+        for level-based compaction.
+        For universal-style compaction, you can usually set it to -1.
 
         | *Type:* ``int``
-        | *Default:* ``1000``
+        | *Default:* ``5000``
 
     .. py:attribute:: block_cache
 
@@ -384,7 +387,7 @@ Options object
         unnecessary Put stalls.
 
         | *Type:* ``int``
-        | *Default:* ``0``
+        | *Default:* ``1``
 
     .. py:attribute:: max_log_file_size
 
@@ -545,7 +548,7 @@ Options object
         Allow the OS to mmap file for reading sst tables
 
         | *Type:* ``bool``
-        | *Default:* ``False``
+        | *Default:* ``True``
 
     .. py:attribute:: allow_mmap_writes
 
diff --git a/rocksdb/tests/test_options.py b/rocksdb/tests/test_options.py
index a993861..b9fa8f0 100644
--- a/rocksdb/tests/test_options.py
+++ b/rocksdb/tests/test_options.py
@@ -24,9 +24,9 @@ class TestMergeOperator(rocksdb.interfaces.MergeOperator):
 class TestOptions(unittest.TestCase):
     def test_simple(self):
         opts = rocksdb.Options()
-        self.assertEqual(False, opts.paranoid_checks)
-        opts.paranoid_checks = True
         self.assertEqual(True, opts.paranoid_checks)
+        opts.paranoid_checks = False
+        self.assertEqual(False, opts.paranoid_checks)
 
         self.assertIsNone(opts.filter_policy)
         ob = TestFilterPolicy()