Weekly update in TiDB

Last week, we landed 24 PRs in the TiDB repositories.

Added

• Add DB_NAME and TABLE_NAME in the result of ADMIN SHOW DDL JOBS
• Add an HTTP API to scatter Regions of a table
• Add the tidb_retry_limit session variable to control the transaction retry limit
• Add the auto_analyze_ratio session variable to control the automatic analysis ratio
• Support the ALTER TABLE FORCE syntax

Fixed

• Restrict the column type in range partition
• Check the privilege for SHOW CREATE TABLE and information_schema.tables
• Check nil for Coprocessor stream response
• Set the index name of ADMIN CHECK INDEX to be case insensitive

Improved

• Reduce the memory usage for duplicated key update
• Add the reorganization log to make trouble shooting easier
• Add failure metrics for checkLeader and prepare

Weekly update in TiSpark

Last week, we landed 1 PR in the TiSpark repositories.

Fixed

• Fix the TopN validation issue

Weekly update in TiKV and PD

Last week, we landed 15 PRs in the TiKV and PD repositories.

Added

• Support compacting the whole cluster
• Scatter the leader distribution in a specified range

Fixed

• Resign the PD leader when it is not the same as the etcd leader
• Fix the parse error of config.toml
• Fix the bug of deleting the valid scheduler when starting the coordinator

Improved

• Attach an interval to Region heartbeats
• Open the nightly feature gate for crossbeam-channel
• Upgrade etcd to v3.3.4