The variable outside `lambda handler` method is not preserved in the subsequences requests

[phuclh]

I have a python script like this:

model = None

def get_model():
    global model

    if model is not None:
        return model

    model = SentenceTransformer('all-MiniLM-L6-v2')

    return model

def lambda_handler(event, context):
    model = get_model()

When the model = SentenceTransformer('all-MiniLM-L6-v2') is initialized it will download the library and this process takes a while. So I put it in the get_model method and return the model from the previous request for subsequence requests to save time.

However, when I execute the lambda function via sidecar within a route.

\App\Sidecar\Functions\Test::execute()

I got timeout for that request, so I put that code into a job and run it in a queue. This time, it ran successfully and I expected the get_model method would return the model from the 1st run in the queue when I re-visit the above route, but it didn't. However, it did return when I dispatched another job to queue (I knew that because this time the job ran much faster).

So I wonder if AWS Lambda creates a different instance for QUEUE and HTTP Request?