We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

hi Ashok,

Number of API to be invoked in parallel depend upon the IS thread pool configuration.

Under the extended settings 

we should look for thread pool settings

watt.server.threadPool
watt.server.maxThreads
watt.server.minThreads

Apart from it, we need to see if there  are any rate limiting and throttling policies configured.

For more details please refer the documentation

https://docs.webmethods.io/on-premises/webmethods-api-gateway/en/11.1.0/pdf/api-gateway-administration-guide.pdf

We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

Thanks for your input.

But I am looking for run time metrics per API. Current / Max concurrent calls for an API.

Something similar to maxResponseTime & totalCount in Performance Metrics.

https://docs.webmethods.io/on-premises/webmethods-api-gateway/en/11.1.0/webhelp/index.html#page/yai-webhelp%2Fre-metrics_events_apigw.html

hi Ashok,

Number of API to be invoked in parallel depend upon the IS thread pool configuration.

Under the extended settings 

we should look for thread pool settings

watt.server.threadPool
watt.server.maxThreads
watt.server.minThreads

Apart from it, we need to see if there  are any rate limiting and throttling policies configured.

For more details please refer the documentation

https://docs.webmethods.io/on-premises/webmethods-api-gateway/en/11.1.0/pdf/api-gateway-administration-guide.pdf

We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

Hi Ashok,

I think some of the details can be fetched from the public API (download API transaction) exposed for API Gateway.

Attaching the postman collction for more details.

Let me know if this helps.

Thanks for your input.

But I am looking for run time metrics per API. Current / Max concurrent calls for an API.

Something similar to maxResponseTime & totalCount in Performance Metrics.

https://docs.webmethods.io/on-premises/webmethods-api-gateway/en/11.1.0/webhelp/index.html#page/yai-webhelp%2Fre-metrics_events_apigw.html

hi Ashok,

Number of API to be invoked in parallel depend upon the IS thread pool configuration.

Under the extended settings 

we should look for thread pool settings

watt.server.threadPool
watt.server.maxThreads
watt.server.minThreads

Apart from it, we need to see if there  are any rate limiting and throttling policies configured.

For more details please refer the documentation

https://docs.webmethods.io/on-premises/webmethods-api-gateway/en/11.1.0/pdf/api-gateway-administration-guide.pdf

We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

------------------------------
Ashok Kumar Bandige
------------------------------

If you have a record of the start and end time for each API instance either through a log file, through service auditing, or through a tool like Otelscope (https://www.nibl.tech/products/otelscope), then it becomes a simple exercise.

1. Sort the records by start time
2. Select the first record as your "main" record and set a variable "concurrent count" to 1
3. Loop over the other records:
   1. If the start time of the current record is less than or equal to the stop time of your "main" record, increment your concurrent count
   2. If not, exit the loop

As you can see, this logic will tell you how many concurrent instances you have relative to that first record. If you repeat this operation for all the other records (hint: nested loop) and you keep track of the largest concurrent count found so far (e.g. maxConcurrentCount), you will get your answer.

------------------------------
Percio
https://nibl.tech

Original Message:
Sent: Tue March 18, 2025 02:02 AM
From: Ashok Kumar Bandige
Subject: Is there a way to find the max concurrent calls an API is processing in webMethods API Gateway?

We are planning to enable bulkhead for our APIs at a global level. Before proceeding, we need to determine the maximum concurrent calls that our APIs are currently processing to set an appropriate value without causing any disruption.

Is there a way to find out the maximum concurrent calls an API is processing in webMethods API Gateway?

Thank you in advance.

Best regards,
Ashok

------------------------------
Ashok Kumar Bandige
------------------------------