github yugabyte/yugabyte-db v2.1.6
v2.1.6 (May 8, 2020)

latest releases:, v2.20.4.1,
4 years ago


  • Wait for tserver to finish creating the transaction table during the initial cluster startup (when the transaction table is first created) before before issuing requests that require it to exist. This was more likely an issue for CI/CD, where requests can be issued immediately. Most users would not encounter this issue. #4056
  • Avoid redundant read for non-unique index inserts. For non-unique indexes, the primary key of the main table is implicitly added to the DocDB key, guaranteeing uniqueness of the full DocDB key (indexed columns plus encoded base table primary key). This fix executes such inserts as upserts and avoid the read and uniqueness check. #4363
  • Enhance automatic query read restart to avoid recreating portal. Instead of recreating a portal, reset an existing one to the state which allows it to be re-executed. Eliminate memory overhead for storing potential big bind variable values (for example, long strings). #4254
  • For CREATE DATABASE statements, improves fault tolerance by making CREATE API requests asynchronously and adds a state machine on namespaces to be the authority for processing these modifications. #3097
  • Display current query runtime (process_running_for_ms), in milliseconds (ms), on <tserver_ip>:13000/rpcz endpoint. #4382


  • Allow system.peers_v2 table to be readable for cassandra-driver-core:3.8.0-yb-2-RC1 so that expected errors are returned to the driver. #4309

System improvements

  • [DocDB] Improve fault tolerance by enabling exponential backoff mechanics for the leader attempting to catch up the follower. If this causes any issues, you set the --enable_consensus_exponential_backoff flag (enabled by default) to false. #4042
  • [DocDB] Improve row scanning by using SeekForward for intents. In testing, performance of SELECT COUNT(*) has improved by 66%. #4277
  • [DocDB] Add asynchronous transaction status resolution to conflict detection. #4058

Yugabyte Platform

  • When performing a full move or add node on a universe that has a yb-master, the server.conf file is now being updated with the new master_addresses. #4242
  • In the Backups tab, individual YSQL tables can no longer be selected. Previously, attempting to back up a YSQL table would create a failed task. #3848
  • In the Metrics view, transactions have been added to the YSQL and YCQL operations charts. #3827
  • Create Read Replica and Edit Read Replica pages are no longer in beta. #4313
  • In the Certificates page, you can now download certificates. #3985
  • In the Universes overview page, add a button to toggle on metrics graph widgets to auto-refresh or to set refresh interval. #2296

Note: Prior to 2.0, YSQL was still in beta. As a result, 2.0 release includes a backward-incompatible file format change for YSQL. This means that if you have an existing cluster running releases older than 2.0 with YSQL enabled, then you will not be able to upgrade to version 2.0+. Export from old cluster and import into a new 2.0+ cluster is needed for using existing data.

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