PingCAP
  • Docs
  • Success Stories
  • Blog
  • About
  • Free Consultation
PingCAP
  • Docs
  • Success Stories
  • Blog
  • About
  • Free Consultation

Contact

中文
Documentation
  • About TiDB
    • TiDB Introduction
    • TiDB Architecture
  • Quick Start
    • TiDB Quick Start Guide
    • Basic SQL Statements
    • Bikeshare Example Database
  • TiDB User Guide
    • TiDB Server Administration
      • The TiDB Server
      • The TiDB Command Options
      • The TiDB Data Directory
      • The TiDB System Database
      • The TiDB System Variables
      • The Proprietary System Variables and Syntax in TiDB
      • The TiDB Server Logs
      • The TiDB Access Privilege System
      • TiDB User Account Management
      • Use Encrypted Connections
    • SQL Optimization
      • Understand the Query Execution Plan
      • Introduction to Statistics
    • Language Structure
      • Literal Values
      • Schema Object Names
      • Keywords and Reserved Words
      • User-Defined Variables
      • Expression Syntax
      • Comment Syntax
    • Globalization
      • Character Set Support
      • Character Set Configuration
      • Time Zone Support
    • Data Types
      • Numeric Types
      • Date and Time Types
      • String Types
      • JSON Types
      • The ENUM data type
      • The SET Type
      • Data Type Default Values
    • Functions and Operators
      • Function and Operator Reference
      • Type Conversion in Expression Evaluation
      • Operators
      • Control Flow Functions
      • String Functions
      • Numeric Functions and Operators
      • Date and Time Functions
      • Bit Functions and Operators
      • Cast Functions and Operators
      • Encryption and Compression Functions
      • Information Functions
      • JSON Functions
      • Aggregate (GROUP BY) Functions
      • Miscellaneous Functions
      • Precision Math
    • SQL Statement Syntax
      • Data Definition Statements
      • Data Manipulation Statements
      • Transactions
      • Database Administration Statements
      • Prepared SQL Statement Syntax
      • Utility Statements
      • TiDB SQL Syntax Diagram
    • JSON Functions and Generated Column
    • Connectors and APIs
    • TiDB Transaction Isolation Levels
    • Error Codes and Troubleshooting
    • Compatibility with MySQL
    • TiDB Memory Control
    • Slow Query Log
    • Advanced Usage
      • Read Data From History Versions
      • Garbage Collection (GC)
  • TiDB Operations Guide
    • Hardware and Software Requirements
    • Deploy
      • Ansible Deployment (Recommended)
      • Offline Deployment Using Ansible
      • Docker Deployment
      • Docker Compose Deployment
      • Cross-Region Deployment
      • Kubernetes Deployment
    • Configure
      • Configuration Flags
      • Configuration File Description
      • Modify Component Configuration Using Ansible
      • Enable TLS Authentication
      • Generate Self-signed Certificates
    • Monitor
      • Overview of the Monitoring Framework
      • Key Metrics
      • Monitor a TiDB Cluster
    • Scale
      • Scale a TiDB Cluster
      • Scale Using Ansible
    • Upgrade
      • Upgrade the Component Version
      • TiDB 2.0 Upgrade Guide
    • Tune Performance
    • Backup and Migrate
      • Backup and Restore
      • Migrate
        • Migration Overview
        • Migrate All the Data
        • Migrate the Data Incrementally
    • TiDB-Ansible Common Operations
    • Troubleshoot
  • TiDB Enterprise Tools
    • Syncer
    • mydumper
    • Loader
    • TiDB-Binlog
    • PD Control
    • PD Recover
    • TiKV Control
    • TiDB Controller
  • TiKV Documentation
  • TiSpark Documentation
    • Quick Start Guide
    • User Guide
  • Frequently Asked Questions (FAQ)
  • TiDB Best Practices
  • Releases
    • 2.1 RC3
    • 2.1 RC2
    • 2.0.7
    • 2.1 RC1
    • 2.0.6
    • 2.0.5
    • 2.1 Beta
    • 2.0.4
    • 2.0.3
    • 2.0.2
    • 2.0.1
    • 2.0
    • 2.0 RC5
    • 2.0 RC4
    • 2.0 RC3
    • 2.0 RC1
    • 1.1 Beta
    • 1.0.8
    • 1.0.7
    • 1.1 Alpha
    • 1.0.6
    • 1.0.5
    • 1.0.4
    • 1.0.3
    • 1.0.2
    • 1.0.1
    • 1.0
    • Pre-GA
    • RC4
    • RC3
    • RC2
    • RC1
  • TiDB Adopters
  • TiDB Roadmap
  • Connect with us
  • More Resources
    • Frequently Used Tools
    • PingCAP Blog
    • Weekly Update

TiDB 1.1 Beta Release Notes

On February 24, 2018, TiDB 1.1 Beta is released. This release has great improvement in MySQL compatibility, SQL optimization, stability, and performance.

TiDB:

  • Add more monitoring metrics and refine the log
  • Compatible with more MySQL syntax
  • Support displaying the table creating time in information_schema
  • Optimize queries containing the MaxOneRow operator
  • Configure the size of intermediate result sets generated by Join, to further reduce the memory used by Join
  • Add the tidb_config session variable to output the current TiDB configuration
  • Fix the panic issue in the Union and Index Join operators
  • Fix the wrong result issue of the Sort Merge Join operator in some scenarios
  • Fix the issue that the Show Index statement shows indexes that are in the process of adding
  • Fix the failure of the Drop Stats statement
  • Optimize the query performance of the SQL engine to improve the test result of the Sysbench Select/OLTP by 10%
  • Improve the computing speed of subqueries in the optimizer using the new execution engine; compared with TiDB 1.0, TiDB 1.1 Beta has great improvement in tests like TPC-H and TPC-DS

PD:

  • Add the Drop Region debug interface
  • Support setting priority of the PD leader
  • Support configuring stores with a specific label not to schedule Raft leaders
  • Add the interfaces to enumerate the health status of each PD
  • Add more metrics
  • Keep the PD leader and the etcd leader together as much as possible in the same node
  • Improve the priority and speed of restoring data when TiKV goes down
  • Enhance the validity check of the data-dir configuration item
  • Optimize the performance of Region heartbeat
  • Fix the issue that hot spot scheduling violates label constraint
  • Fix other stability issues

TiKV:

  • Traverse locks using offset + limit to avoid potential GC problems
  • Support resolving locks in batches to improve GC speed
  • Support GC concurrency to improve GC speed
  • Update the Region size using the RocksDB compaction listener for more accurate PD scheduling
  • Delete the outdated data in batches using DeleteFilesInRanges, to make TiKV start faster
  • Configure the Raft snapshot max size to avoid the retained files taking up too much space
  • Support more recovery operations in tikv-ctl
  • Optimize the ordered flow aggregation operation
  • Improve metrics and fix bugs
"TiDB 1.1 Beta Release Notes" was last updated Feb 24 2018: Add the release notes for 1.1 beta (#352) (67f64ef)
Improve this page

What’s on this page

Product

  • TiDB
  • TiSpark
  • Roadmap
  • TiDB Cloud

Docs

  • Quick Start
  • Best Practices
  • FAQ
  • TiDB Utilities
  • Release Notes

Resources

  • Blog
  • Weekly
  • GitHub
  • TiDB Academy
  • TiDB Community

Company

  • About
  • Careers
  • News
  • Contact Us
  • Privacy Policy
  • Terms of Service

Connect

  • Twitter
  • LinkedIn
  • Reddit
  • Google Group
  • Stack Overflow

© 2018 PingCAP. All Rights Reserved.

中文