WT-3002 Allow applications to exempt threads from eviction. (#3116)

* WT-3002 Allow applications to exempt threads from eviction.

* Update wiredtiger.in.

* Rename config key, make WT_SESSION::reconfigure only apply to passed-in values.

Add a basic smoke test of WT_SESSION::reconfigure.

* whitespace

* Update.

1 files changed, 47 insertions, 0 deletions

diff --git a/test/suite/test_reconfig04.py b/test/suite/test_reconfig04.py
new file mode 100644
index 00000000000..be5e6d3729e
--- /dev/null
+++ b/test/suite/test_reconfig04.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+#
+# Public Domain 2014-2016 MongoDB, Inc.
+# Public Domain 2008-2014 WiredTiger, Inc.
+#
+# This is free and unencumbered software released into the public domain.
+#
+# Anyone is free to copy, modify, publish, use, compile, sell, or
+# distribute this software, either in source code form or as a compiled
+# binary, for any purpose, commercial or non-commercial, and by any
+# means.
+#
+# In jurisdictions that recognize copyright laws, the author or authors
+# of this software dedicate any and all copyright interest in the
+# software to the public domain. We make this dedication for the benefit
+# of the public at large and to the detriment of our heirs and
+# successors. We intend this dedication to be an overt act of
+# relinquishment in perpetuity of all present and future rights to this
+# software under copyright law.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+
+import fnmatch, os, time
+import wiredtiger, wttest
+from wtdataset import SimpleDataSet
+
+# test_reconfig04.py
+#    Test WT_SESSION::reconfigure
+class test_reconfig04(wttest.WiredTigerTestCase):
+    def test_session_reconfigure(self):
+        self.session.reconfigure('ignore_cache_size=false')
+
+        self.session.reconfigure('isolation=snapshot')
+        self.session.reconfigure('isolation=read-committed')
+        self.session.reconfigure('isolation=read-uncommitted')
+
+        self.session.reconfigure('ignore_cache_size=true')
+        self.session.reconfigure('isolation=snapshot')
+
+if __name__ == '__main__':
+    wttest.run()