Weekly update in TiDB

Last week, we landed 68 PRs in the TiDB repository.

Added

• Add a column describing memory usage for information_schema.processlist
• Add the update-stats bool configuration to control the updating statistics

Improved

• Remove expired keys from PD
• Reuse the tipb.Expr value to push down expression implicitParameters
• Make RangeTaskRunner support dividing tasks by Region
• Notify affected Regions after sending UnsafeDestroyRange requests

Fixed

• Fix the alter table drop partition check on hash partitioned tables
• Fix the wrong row count in fast Analyze
• Fix the performance issue in the mixed transaction mode
• Re-implement the kill statement in a safe way
• Fix the CMSketch index for fast Analyze
• Fix the configuration JSON key of PessimisticTxn
• Fix the issue that the pb memory cannot be released quickly
• Fix the issue that GC stops working when an error occurs during the execution process of the UnsafeDestroyRange operation

Weekly update in TiSpark

Last week, we landed 12 PRs in the TiSpark repository.

Added

• Add a feature of locking a table
• Add documents about Timezone and support writing data of the Timestamp type

Improved

• Update Spark version for the spark_2.4 profile to Spark 2.4.3
• Extend JODA DateTime to support scaling Timestamp up to microseconds

Weekly update in TiKV and PD

Last week, we landed 47 PRs in the TiKV and PD repositories.

Improved

• Adjust the meaning for store-balance-rate
• Resolve the problem that stores might be overloaded for a long time
• Validate block-size in the column family option of RocksDB
• Add a command to show the replication configuration in pd-ctl
• Do not support dynamic allocation in decimal

Added

• Implement the if_null RPN Function
• Implement the add_time_string_null RPN Function

New contributors (Thanks!)

tikv:

• NOVA-ME
• summer-slow-grace