add MVCC evaluation paper

databases.md

@@ -20,6 +20,7 @@
 - [ ] 📖 [**Transaction Processing: Concepts and Techniques**](https://www.amazon.com/Transaction-Processing-Concepts-Techniques-Management/dp/1558601902#customerReviews) (J Gray, A Reuter 1992)
 - [x] 📄 [A Critique of ANSI SQL Isolation Levels](https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/tr-95-51.pdf) (H Berenson et al 1995)
 - [ ] 📄 [ACIDRain: Concurrency-Related Attacks on Database-Backed Web Applications](http://www.bailis.org/papers/acidrain-sigmod2017.pdf) (P Bailis, T Warszawski 2017)
+- [ ] 📄 [An Empirical Evaluation of In-Memory Multi-Version Concurrency Control](https://yingjunwu.github.io/papers/vldb2017.pdf) (Y Wu et al 2017)
 - [ ] 📄 [Building Consistent Transactions with Inconsistent Replication](http://delivery.acm.org/10.1145/2820000/2815404/p263-zhang.pdf) (I Zhang et al 2015)
 - [ ] 📄 [Calvin: Fast Distributed Transactions for Partitioned Database Systems](http://cs.yale.edu/homes/thomson/publications/calvin-sigmod12.pdf) (DJ Abadi et al 2012) _"The Calvin paper"_
 - [ ] 📄 [Consistency in Non-Transactional Distributed Storage Systems](https://arxiv.org/pdf/1512.00168.pdf) (P Viotti, M Vukolić 2016)