release-1.0.3.md

title	aliases	summary
TiDB 1.0.3 Release Notes	/docs/dev/releases/release-1.0.3/ /docs/dev/releases/103/	TiDB 1.0.3 was released on November 28, 2017. Updates include performance optimization, new configuration options, and bug fixes. PD now supports adding more schedulers using API, and TiKV has fixed deadlock and leader value issues. To upgrade from 1.0.2 to 1.0.3, follow the rolling upgrade order of PD, TiKV, and TiDB.

TiDB 1.0.3 Release Notes

On November 28, 2017, TiDB 1.0.3 is released with the following updates:

TiDB

• Optimize the performance in transaction conflicts scenario
• Add the TokenLimit option in the config file
• Output the default database in slow query logs
• Remove the DDL statement from query duration metrics
• Optimize the query cost estimation
• Fix the index prefix issue when creating tables
• Support pushing down the expressions for the Float type to TiKV
• Fix the issue that it is slow to add index for tables with discrete integer primary index
• Reduce the unnecessary statistics updates
• Fix a potential issue during the transaction retry

PD

• Support adding more types of schedulers using API

TiKV

• Fix the deadlock issue with the PD client
• Fix the issue that the wrong leader value is prompted for NotLeader
• Fix the issue that the chunk size is too large in the coprocessor

To upgrade from 1.0.2 to 1.0.3, follow the rolling upgrade order of PD -> TiKV -> TiDB.