Recently Alexandr announced new Percona-XtraDB-9.1 release, and now it is good time to summarize features we have and what is expected soon.
This release contains long waited features from 5.0:
-
- USER/TABLE/INDEX/CLIENT_STATISTICS + THREAD_STATISTICS ( coming in release-10)
Extended slow.log is now even more extended, there is additional information for each query:
|
|
# Bytes_sent: 4973 Tmp_tables: 1 Tmp_disk_tables: 1 Tmp_table_sizes: 7808 |
That is you can see how many bytes was returned by query, was temporary table used,
was it disk table or in-memory, and how big was temporary table.
Also you can profile each individual query from stored procedures, so now you should not
guess what took so long in stored procedure.
What we are working on right now is:
-
- InnoDB pagesize, so you will be able to specify 4K, 8K, 16K pagesize when you created database
-
- InnoDB fast checksums, idea and implementation was taken from Facebook patches
-
- InnoDB big log files ( bigger 4GB). As our benchmarks on FusionIO shows, you may need
4GB+ log files to get more performance on fast storage systems
-
- INFORMATION_SCHEMA.SYS_TABLES and SYS_INDEXES to show internal InnoDB data dictionary
Full list of XtraDB engine features (what makes it different from InnoDB-plugin) on the state as it is right now:
Performance improvements
-
- Improved buffer_pool scalability
-
- Improved rollback segment scalability
-
- Limited size of data dictionary in memory
-
- Increased number of concurrent write transactions (undo slots) ( up to 4000 )
-
- Fast checksums ( in release process )
- Support of different pagesizes ( 4K, 8K, 16K) ( in release process )
Usability / operations
- Show content of buffer_pool
- Import / export of dedicated tables
- Import / export of buffer_pool
- Transactional replication
- Show internal InnoDB data dictionary
- Show InnoDB locking/io profiling in slow.log
I hope you enjoy our work!
