Sorry for one more follow up. 😅
Is the grpc executor thread pool shared across different rpc services.
Say I have
service a {
rpc test()
}
service b{
rpc test()
}
If service a and service b are implemented on the same server, do they
share the same thread pool?
On Thu, Dec 22, 2022 at 1:14 PM 'sanjay...@google.com' via grpc.io <
grpc-io@googlegroups.com> wrote:
>
>>>> Wondering if there is limited token by default for auto flow control?
>>>>
>>>
>>> I guess there has to be a limit for backpressure to work. Are you asking
>>> if it's possible to change the token limit?
>>>
>> Yeah. I am asking what the limit is by default. If I want to change it, I
>> have to do manual flow control I suppose?
>>
>
> It is 1 : it asks for one more request-message after receiving a message:
> see
> https://github.com/grpc/grpc-java/blob/master/stub/src/main/java/io/grpc/stub/ServerCalls.java#L266
>
>
>
>>
>>>
>>>
>>>>
>>>> If not, say I have 20 threads, one rpc with 20 streams with blocking
>>>> onNext() will block 20 threads?
>>>>
>>>
>>> One rpc is one stream. Unless you are saying there are 20 incoming rpc
>>> instances of the same method in which case there will be 20 streams. You
>>> are right: it will take up 20 threads.
>>>
>>>
>> Sorry for the confusion. I meant for StreamingRPC. Say one rpc client
>> (one rpc method) calls onNext() 10 times. and each onNext() for the rpc
>> server side is blocking. How many threads will this rpc block?
>>
>
> All messages in a streaming RPC are strictly sequential so it will take
> only one thread on the server side. Unless a message is completely
> processed the next message in the stream is not accepted for processing.
>
>
>
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