Weekly update in TiDB

Last week, we landed 21 PRs in the TiDB repositories.

Added

• Add metrics for related region count for a transaction.

• Record sql_mode in session context.

• Support Show Processlist.

• Add an empty Triggers table in information_schema database.

• Support ANSI_QUOTES sql_mode in parser.

• Support use wildcard as user hostname in grant statement.

• Support the MD5 builtin function.

• Support the SHA/SHA1 builtin function.

Fixed

• Use PI as identifier

• Fix a panic in prepared statement.

Improved

• Use unique key to eliminate aggregation.

• Tuning tikv client max timeout parameter.

• Adjust log level in tikv client.

Weekly update in TiKV

Last week, We landed 8 PRs in the TiKV repositories.

Added

• Use ReadIndex to serve safe Raft read.

• Add tso command for pd-ctl.

• Add ServerIsBusy metric.

Fixed

• Fix a data race when update configuration.

Improved

• Notify PD immediately when leader changes.

• Make scheduler TooBusy threshold configurable.