What is the impact of configuring a Cloud Run service with concurrency: 1 compared to the default concurrency setting?

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GCP - Cloud Run

What is the impact of configuring a Cloud Run service with concurrency: 1 compared to the default concurrency setting?

AEach container instance handles only one request at a time, potentially increasing instance count and cost.

BThe service will reject concurrent requests and queue them indefinitely.

CThe service will automatically scale down to zero instances immediately after each request.

DThe container instances will handle multiple requests simultaneously by default.

Step-by-Step Solution

Solution:

Step 1: Understand concurrency setting
Setting concurrency to 1 means each instance processes one request at a time.
Step 2: Effect on scaling and cost
This can increase the number of instances needed under load, potentially raising costs.
Step 3: Eliminate incorrect options
The service will reject concurrent requests and queue them indefinitely. is wrong because requests are queued but not indefinitely. The service will automatically scale down to zero instances immediately after each request. is unrelated to concurrency. The container instances will handle multiple requests simultaneously by default. describes default concurrency >1.
Final Answer:
Each container instance handles only one request at a time, potentially increasing instance count and cost. -> Option A
Quick Check:
Concurrency 1 means one request per instance [OK]

Quick Trick: Concurrency 1 means single request per instance [OK]

Common Mistakes:

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