TiKV - v5.1.0

Improvements

• Use zstd to compress Region snapshots, preventing large space differences between nodes in case of heavy scheduling or scaling #10005
• Solve OOM issues in multiple cases #10183
• Add memory usage tracking for each module
• Solve the OOM issue caused by oversized Raft entries cache
• Solve the OOM issue caused by stacked GC tasks
• Solve the OOM issue caused by fetching too many Raft entries from the Raft log to memory at one time
• Split Regions more evenly to mitigate the issue that the growth of Region size exceeds the splitting speed when there are hotspot writes #9785

Bug Fixes

• Fix the issue that the coprocessor fails to properly handle the signed or unsigned integer types in the IN expression #9821
• Fix the issue of many empty Regions after batch ingesting SST files #964
• Fix a bug that TiKV cannot start up after the file dictionary file is damaged #9886
• Fix a TiCDC OOM issue caused by reading old values #9996 #9981
• Fix the issue of empty value in the secondary index for the clustered primary key column when collation is latin1_bin #24548
• Add the abort-on-panic configuration, which allows TiKV to generate the core dump file when panic occurs. Users still need to correctly configure the environment to enable core dump #10216
• Fix the performance regression issue of point get queries that occurs when TiKV is not busy #10046