release-1.0.3.md

title	aliases
TiDB 1.0.3 Release Notes	/docs/dev/releases/release-1.0.3/ /docs/dev/releases/103/

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.