glorv

in_memory_engine: add a debug API for IME to show current cached regions metadata

1

### What is changed and how it works? Issue Number: ref #16141 What's Changed: ```commit-message Add a "/cached_regions" http inteface to fetch current cached regions metadata. ``` ### Related changes...

config: adjust default value of config `rocksdb.max-manifest-file-size` from 128MiB to 512MiB

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### What is changed and how it works? Issue Number: ref #15990 What's Changed: ```commit-message The default value of config `rocksdb.max-manifest-file-size` is too small for large clusters with more than...

resource_control: add dynamic privilege description for resource group admin and user

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### First-time contributors' checklist - [ ] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) ###...

compaction: add a new option 'bottom_level_check_range_overlap' for manual compact

2

- The new option `bottom_level_check_range_overlap` is used for manual compact to ensure the SST file in the bottom level with a huge range can be force partitioned with manual compaction....

add a new manual compaction option 'bottom_level_check_range_overlap'

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The rocksdb side change is https://github.com/tikv/rocksdb/pull/421

## Bug Report In one production env, 1 tikv's read pool pending increased to the limit in a very short time and caused it reject all following read requests. And...

The coprocessor scanner's performance is very poor when the request contains large amount of ranges

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## Bug Report In one cluster we found that the tikv CPU usage is abnormally high in performing IndexLoopUp with large amount of small ranges while most of the ranges...

tikv: update rocksdb.max-manifest-file-size default value

3

### First-time contributors' checklist - [ ] I've signed the [**Contributor License Agreement**](https://cla.pingcap.net/pingcap/docs), which is required for the repository owners to accept my contribution. ### What is changed, added or...

tikv: update rocksdb.max-manifest-file-size default value

3

### First-time contributors' checklist - [ ] I've signed the [**Contributor License Agreement**](https://cla.pingcap.net/pingcap/docs), which is required for the repository owners to accept my contribution. ### What is changed, added or...