RAM observations

Author: NikolayS

benchmarks.md

@@ -161,6 +161,8 @@ At the same time, plpython2u-based function showed very similar (sometimes even
 
 There is practically no difference between plpython2u and plpython3u functions.
 
-The bottom line: the [pgsql-http](https://github.com/pramsey/pgsql-http) doesn't seem to perform better than plpython2u function. The plpython2u-based approach wins because:
+The bottom line: the [pgsql-http](https://github.com/pramsey/pgsql-http) doesn't seem to perform better than plpython2u function. However, pgsql-http is better in terms of memory consumption (in the examples above, postgres+plpythonu took ~20% more RAM than postgres backends with pgsql-http; for plsh, postgres backend combined with curl process took the same RAM resources as postgres+plpythonu backend).
+
+The plpython2u-based approach wins because:
  - it's not slower than pgsql-http 
  - it's much easier to deploy.