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TiDB 2.1.11 Release Notes
/docs/dev/releases/release-2.1.11/
/docs/dev/releases/2.1.11/
TiDB 2.1.11 was released on June 03, 2019. It includes fixes for various issues in TiDB, PD, TiKV, and Tools. Some highlights are the fix for incorrect schema in delete from join, calculation errors of unix_timestamp(), and the addition of Drainer parameters in TiDB Ansible.

TiDB 2.1.11 Release Notes

Release date: June 03, 2019

TiDB version: 2.1.11

TiDB Ansible version: 2.1.11

TiDB

  • Fix the issue that incorrect schema is used for delete from join #10595
  • Fix the issue that the built-in CONVERT() may return incorrect field type #10263
  • Merge non-overlapped feedback when updating bucket count #10569
  • Fix calculation errors of unix_timestamp()-unix_timestamp(now()) #10491
  • Fix the incompatibility issue of period_diff with MySQL 8.0 #10501
  • Skip Virtual Column when collecting statistics to avoid exceptions #10628
  • Support the SHOW OPEN TABLES statement #10374
  • Fix the issue that goroutine leak may happen in some cases #10656
  • Fix the issue that setting the tidb_snapshot variable in some cases may cause incorrect parsing of time format #10637

PD

  • Fix the issue that hots Region may fail to be scheduled due to balance-region #1551
  • Set hotspot related scheduling priorities to high #1551
  • Add two configuration items #1551
    • hot-region-schedule-limit to control the maximum number of concurrent hotspot scheduling tasks
    • hot-region-cache-hits-threshold to identify a hot Region

TiKV

  • Fix the issue that the learner reads an empty index when there is only one leader and one learner #4751
  • Process ScanLock and ResolveLock in the thread pool with a high priority to reduce their impacts on commands with a normal priority #4791
  • Sync all files of received snapshots #4811

Tools

  • TiDB Binlog
    • Limit data deletion speed during GC to avoid QPS degrading caused by WritePause #620

TiDB Ansible

  • Add Drainer parameters #760