TiKV - v6.4.0

Improvements

• Add a new configuration item apply-yield-write-size to control the maximum number of bytes that the Apply thread can write for one Finite-state Machine in one round of poll, and relieve Raftstore congestion when the Apply thread writes a large volume of data #13313 @glorv
• Warm up the entry cache before migrating the leader of Region to avoid QPS jitter during the leader transfer process #13060 @cosven
• Support pushing down the json_constains operator to Coprocessor #13592 @lizhenhuan
• Add the asynchronous function for CausalTsProvider to improve the flush performance in some scenarios #13428 @zeminzhou

Bug fixes

• Fix the issue that TiDB fails to start on Gitpod when there are multiple cgroup and mountinfo records #13660 @tabokie
• Fix the wrong expression of a TiKV metric tikv_gc_compaction_filtered #13537 @Defined2014
• Fix the performance issue caused by the abnormal delete_files_in_range #13534 @tabokie
• Fix abnormal Region competition caused by expired lease during snapshot acquisition #13553 @SpadeA-Tang
• Fix errors occurred when FLASHBACK fails in the first batch #13672 #13704 #13723 @HuSharp