The privilege management is refined to enable users to manage the data access privileges using the same way as in MySQL.
DDL is accelerated.
The load balancing policy and process are optimized for performance.
TiDB-Ansible is open sourced. By using TiDB-Ansilbe, you can deploy, upgrade, start and shutdown a TiDB cluster with one click.
The following features are added or improved in the SQL query optimizer:
Support incremental statistics
Merge Sort Join operator
Index Lookup Join operator
Optimizer Hint Syntax
Optimize the memory consumption of the
Optimize the Cost Based Optimizer (CBO) framework
Support more complete privilege management
Support using HTTP API to get the data distribution information of tables
Support using system variables to control the query concurrency
Add more MySQL built-in functions
Support using system variables to automatically split a big transaction into smaller ones to commit
Provide the Disaster Recovery Toolkit
Use Garbage Collection to clear stale data automatically
Support more efficient data balance
Support hot Region scheduling to enable load balancing and speed up the data importing
Accelerate getting Client TSO
Improve the efficiency of Region Heartbeat processing
Update the Replica configuration dynamically
Get the Timestamp Oracle (TSO)
Use ID to get the Region information
Support the Sorted String Table (SST) format snapshot to improve the load balancing speed of a cluster
Support using the Heap Profile to uncover memory leaks
Support Streaming SIMD Extensions (SSE) and speed up the CRC32 calculation
Accelerate transferring leader for faster load balancing
Use Batch Apply to reduce CPU usage and improve the write performance
Support parallel Prewrite to improve the transaction write speed
Optimize the scheduling of the coprocessor thread pool to reduce the impact of big queries on point get
The new Loader supports data importing at the table level, as well as splitting a big table into smaller logical blocks to import concurrently to improve the data importing speed.
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