Percona Server and XtraBackup weekly news, March 5th
What’s new this week in Percona Server:
For users who upgraded to Squeeze, the new version of Debian, we’re expecting to support Squeeze in our repositories on the next release based on MySQL 5.1.55, which we estimate will be released on March 9th. This should also update the Maverick repository for Ubuntu users.
- If you’re waiting for the innodb_lazy_drop_table feature in Percona Server, unfortunately it doesn’t look like we can get it into the next release. It was just too late in the release process to have time to do proper QA, and we take quality very seriously.
- Yasufumi clarified his idea for XtraDB to store statistics for the ::records_in_range() handler function, instead of accessing the data. This would prevent queries from needing to enter the InnoDB kernel during the planning phase, which can be a severe bottleneck especially for complex queries, which need to check the number of records in ranges many times. If you have ever seen a server with dozens of queries in “statistics” state, that’s the bottleneck this feature could help alleviate.
- We merged a change developed by Facebook that reduces excess fcntl() calls. This has been shown to double throughput on sysbench benchmarks.
News for XtraBackup:
- Alexey reports that implementation of the custom streaming format is complete.
- We are working on releasing XtraBackup 1.5 as stable (it’s currently a Release Candidate), but we don’t have a firm release date.
- We are also working towards XtraBackup 1.6, which contains lots of new features, and of course fixes bugs.
- We have decided to make innobackupex always back up the MySQL system database, even for partial backups; it contains data that is necessary to restore other data correctly.