1. Eliminate the buffer pool mutex (Percona contribution)
2. Data dictionary in all InnoDB storage engine that supports DDL atomicity, crash safe, metadata management and better (can use ibd2sdi tool to extract metadata)
3. fast online add new columns (Tencent mutual entertainment DBA team contribution)
4. parallel redo log, and improve I / O performance of the redo log. Can be adjusted online redo log buffer
5. New inverted index, the index is not visible
6. optimizer enhancement, enhancement characteristics CBO
7. Support session level set_var dynamically adjust some parameters
8. Reconstruction SQL parser (SQL Parser)
9. row lock nowait increase skip locked and feature options
10. New transaction CATS features greatly enhance the transaction performance
11. Online modify the number of undo log
12. Histogram
13. Certification by the sha256_password plug into caching_sha2_password
14. The new role role function, the rights group then packaged Reauthorization
15. The auto-increment persistence
16. JSON enhanced performance, functionality
17. The new smart option innodb_dedicated_server
18.InnoDB memcached plugin support mget operations
19. Enhanced redo / undo log encryption
20. The increased functionality resource group
21. Add more data dictionary
22. The default character set into a utf8mb4
23. The general expression CTE
24. The window function
25.SET PERSIST
26.restart function
27. Cancellation QC