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MySQL Engineering Blogs

MySQL Shell Dump & Load part 4: Dump Instance & Schemas
MySQL Shell 8.0.21 comes with two utilities which can be used to perform logical dumps of all the schemas from an instance (util.dumpInstance()) or selected schemas (util.dumpSchemas()). These tools offer major performance improvements over the mysqldump utility, some of our benchmarks show a...

New Consistency for Datafile Locations in MySQL 8.0.21
When you create a general tablespace in MySQL 8.0, you can choose the directory where the associated datafile is created. CREATE TABLESPACE tablespace_name ADD DATAFILE ‘/my/table/space/dir’; However, that directory must be known to InnoDB. Known directories are defined by the following...

Improvements to Undo Truncation in MySQL 8.0.21
Undo Tablespaces can be truncated either implicitly or explicitly in MySQL 8.0. Both methods use the same mechanism. This mechanism could cause periodic stalls on very busy systems while an undo tablespace truncate completes. This problem has been fixed in MySQL 8.0.21.…

Top Blog Posts about MySQL 8.0.21
As with any new releases, MySQL 8.0.21 introduces many new improvements and updates, many of which deserve their own blog post for a deep dive into the new features.  Among the notable changes are: Account Management Notes, JSON Notes, Authentication Notes and changes related to InnoDB,...

MySQL Shell Dump & Load part 3: Load Dump
Introduced in MySQL Shell 8.0.21, the new MySQL Shell Dump and Load utilities has as its main goal to minimize the time needed to create and restore logical dumps of large data sets. Through heavy parallelization and other techniques, we were able to reduce the time needed for these tasks by an...

MySQL Shell Dump & Load part 2: Benchmarks
This second part about the new MySQL Shell Dump & Load utilities aims to demonstrate the performance while also comparing it with various other logical dump and load tools available: mysqldump, mysqlpump & mydumper. To make the numbers more meaningful, I used several real world production...

MySQL Shell Dump & Load part 1: Demo!
MySQL Shell 8.0.21 includes some exciting new utilities to create a logical dump and do a logical restore, with a focus on ease of use, performance and integration. In MySQL Shell 8.0.17, we already introduced a multi-threaded CSV import utility util.importTable()…

More Robust Network Partition Handling in Group Replication
As Group Replication (GR) matures and it is deployed in a myriad of different systems, we begin to witness specific network conditions that we must be able to cope with in order to make Group Replication more tolerant and robust to those failures.…

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