Copyright © 2016 MariaDB. All rights reserved.
Get the Free Gartner Report on Optimizing with Open Source
This is in 10.2, albeit slightly different from Percona's . For transactional workloads should be on par or better. One of the features I that did not excite me in Percona's implementation is "low priority connection throttling", as this seems a little dangerous optimization with potential for deadlocks, so this is not there in MariaDB. I also think thread_pool_kickup_timer is more reliable mechanism to avoid stalling low priority threads as compared to Percona's "tickets".
Download MariaDB and start working immediately! You can also get subscription details and learn more about the advantages of MariaDB's additional service offers.