Questions about setting the default number of threads on the client

[zhongqishang]

Is your feature request related to a problem? Please describe.

Nacos is a great component!

We use it with flink/spark/hive in the bigdata hadoop system. Our machine cpu is 80. Each machine has about 60+ containers, which is 60+ JVM instances. According to ThreadUtils.getSuitableThreadCount() The result will be 128. It caused a lot of thread usage.

That is, 128 com.alibaba.nacos.client.Worker and 64 com.alibaba.nacos.client.naming.updater.xx.

For server side, use ThreadUtils.getSuitableThreadCount() to set thread num is suitable.
But for client side, i think this is not a suitable default value.

Now i via -Dnacos.common.processors=2 to set.

Describe the solution you'd like

Add max thread count value config or default thread count value for client side.
BTW, include client side grpc client

Describe alternatives you've considered

None

Additional context

None

[KomachiSion]

I think the suitable thread based on processor number is right logic, but I think client provide config the max count thread size also right.

But the problem is, what's the default max count value? If same with now, default no limit, only when users config the max count, it works. Is it ok?

[zhongqishang]

I think the suitable thread based on processor number is right logic, but I think client provide config the max count thread size also right.

But the problem is, what's the default max count value? If same with now, default no limit, only when users config the max count, it works. Is it ok?

I think i get you said the right logic is for the most cloud/container env. right?
I agree with that, but for some phisycal machine deploy multiple app, this default value may not be suitable.

Consider compatible and for most scenarios, and same with now is appropriate. Add a new parameter and it is appropriate to explain it in the documentation.

[KomachiSion]

If add this configuration to set max thread count, the document must be updated and it's in plan.

The problem is what's the default value of max thread count, if no setting, the value is -1 and means use old logic with ThreadUtils.getSuitableThreadCount() .

[zhongqishang]

I think no setting and the default value is -1 and means use old logic is reasonable.
This will be not effect user upgrade client version, and provided a code way to set max thread count.

[KomachiSion]

I think no setting and the default value is -1 and means use old logic is reasonable. This will be not effect user upgrade client version, and provided a code way to set max thread count.

If no arguemnt, welcome to submit PR to do this.