Neil Shen

Sequence support is incomplete

2

### Is your feature request related to a problem? Sequence support is incomplete in TiCDC. The current capability of TiCDC: > The [DDL operation CREATE SEQUENCE](https://docs.pingcap.com/tidb/stable/sql-statement-create-sequence) and the [SEQUENCE function](https://docs.pingcap.com/tidb/stable/sql-statement-create-sequence#sequence-function)...

Support collecting gRPC core metrics

10

Collect gRPC core metrics: * Counters: * client_calls_created * server_calls_created * client_channels_created * client_subchannels_created * server_channels_created * insecure_connections_created * syscall_write * syscall_read * tcp_read_alloc_8k * tcp_read_alloc_64k * http2_settings_writes * http2_pings_sent...

TiCDC OOM due to match prewrite-commit during large txn

2

### What did you do? Cluster: * tikv 4 nodes, 16GB memory * ticdc 1 node, 32GB memory Run a large txn in upstream. ```shell $ sysbench --db-driver=mysql --mysql-host=10.2.12.11 --mysql-port=31030...

Generate cpp code

3

Currently we support generating Golang and Rust code. We should also consider to generate Cpp code, because there are many projects written in Cpp. It would be convenient for them...

Support asynchronously incrementally sync files to disk while they are being written

4

The idea is borrowed from RocksDB `bytes_per_sync`. It uses `sync_file_range`[^1] that allows asynchronously incrementally sync files to disk while they are being written. It smoothes out write I/Os over time...

Unsafe recovery partially fills key range hole

3

## Bug Report On a 4-node TiKV cluster, we stops two nodes and then starts unsafe recovery using pd-ctl. After unsafe recovery, we find there are lots of PD server...

coprocessor: limit concurrent requests by memory quota

4

### What is changed and how it works? Issue Number: Close #16653 What's Changed: ```commit-message Fix an issue that a large number of concurrent coprocessor requests may cause OOM. This...