What Factors Contribute to Cold Start Times? Considering user demand for instant gratification, this lag can seriously harm the quality and competitiveness of applications. The time it takes to create this instance, transfer function code, import dependencies, and deploy the instance make up the cold start time.Ĭold starts are a significant challenge in serverless architectures because they can create a noticeable lag for users. When a function is invoked and there are either no function containers running or not enough to handle the current requests, a new instance is made. However, if it is not called before the time runs out, the container is terminated. Each time the function is called this timer is reset. When function instances are created in Lambda, each instance only persists for a limited period, usually between 10 to 15 minutes.
#Lambda startup time how to#
Every time a Lambda function gets called, it receives an event and also a context as an argument. In order to do that, we have to use the context object.
#Lambda startup time code#
We might wonder how much time do we have left in order to execute our code before the timeout hits. We can see the random cat fact over here.
In fact, I am delaying this GET request by 5 seconds. After I save that and go over here, and test it again, we're going to see that there will be no longer a timeout. You can put it up to close to 3 gigabytes, but I'm going to leave it as 128 megabytes, because this is more than enough for this function. You could also increase the memory for your function. The maximum timeout, as of today, is 15 minutes. For instance, I can set it to 30 seconds. By default, every Lambda function is going to time out after 3 seconds. If we scroll down in the AWS console, what we're going to see is that there is a timeout in memory in basic settings of this Lambda function. Right now, after 5 seconds, I'm going to get a timeout, because our task has timed out after 3 seconds. I'm going to save it, and I'm going to test it. If I were to call it like this, I'm going to delay this execution of this GET request by 5 seconds. The sleep function is going to delay our function by the timeout provided as an argument. This Lambda function also has a sleep function in it. If I test this function, I'm going to see the cat fact over here. In this case, it's calling the Cat Fact API and is going to print a random cat fact. Instructor: We have a Lambda function calling an external API.