feat: add some params for rocksdb write

[MalikHou]

Add some new params for rocksdb

Background

Frequent write stop/stall in large-volume random write tests

Change

• add level0_file_num_compaction_trigger
• add level0_stop_writes_trigger
• add level0_slowdown_writes_trigger
• add min_write_buffer_number_to_merge
• add max_bytes_for_level_base
• add max_subcompactions

For the sake of compatibility, the parameters in MR still maintain the default parameters of Rocksdb. If necessary, you can test and adjust by yourself.

Result

In the case of a large number of random writes, the write/stall situation can be greatly alleviated through specific parameter combinations.

[MalikHou]

!!! This configuration is only reasonable for specific scenarios, please do not imitate it.!!!
eg:

db-instance-num：6
write-buffer-size : 512M
max-write-buffer-num : 3
max-write-buffer-size : 15G
min-write-buffer-number-to-merge : 1
level0-stop-writes-trigger : 10000
level0-slowdown-writes-trigger : 10000
level0-file-num-compaction-trigger : 4 
max_subcompactions ：4
max-background-flushes : 6
max-background-compactions : 8
max-background-jobs : 12
target-file-size-base : 512M

---

before

---

after

[wangshao1]

我理解这些参数本身rocksdb已经支持了动态调节，您是否可以一块修改下pika代码，支持通过config set动态调节这些参数？

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

I understand that rocksdb already supports dynamic adjustment of these parameters. Can you modify the pika code together to support dynamic adjustment of these parameters through config set?

[MalikHou]

我理解这些参数本身rocksdb已经支持了动态调节，您是否可以一块修改下pika代码，支持通过config set动态调节这些参数？

好的

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

I understand that rocksdb already supports dynamic adjustment of these parameters. Can you modify the pika code together to support dynamic adjustment of these parameters through config set?

OK

[MalikHou]

我理解这些参数本身rocksdb已经支持了动态调节，您是否可以一块修改下pika代码，支持通过config set动态调节这些参数？

pls view

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

I understand that rocksdb already supports dynamic adjustment of these parameters. Can you modify the pika code together to support dynamic adjustment of these parameters through config set?

pls view

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

[MalikHou]