This release is based on MySQL 5.7.20 and includes all the bug fixes in it. Percona Server 5.7.20-19 is now the current GA (Generally Available) release in the 5.7 series. All software developed by Percona is open-source and free. Details of this release can be found in the 5.7.20-19 milestone on Launchpad.
innodb_print_lock_wait_timeout_infovariable, introduced in previous release, but undocumented, allows to log information about all lock wait timeout errors.
binlog_rows_query_log_eventsoption enabled. Bug fixed #1722789 (upstream #88057).
mysqld_safescript forced it to print an extra error when stopping the MySQL service. Bugs fixed #1738742.
mysql.slave_master_infotable sync on each of them even with
sync_master_infoset to zero, causing huge increase in write load. Bug fixed #1708033 (upstream #85158).
rocksdb_getupdatessince_callswere renamed to
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