I think about provisioned concurrency as something that eliminates the cold starts and not something that saves money. There is a bit of saving if you can keep the lambda function running all the time (100%) utilization, but as you've calculated it becomes quite expensive when the provisioned capacity sits idle.
Answer from Tamás Sallai on Stack OverflowDashbird
dashbird.io › home › knowledge base › aws lambda › provisioned concurrency
AWS Lambda Provisioned Concurrency | Dashbird
June 29, 2021 - The Provisioned Concurrency pricing model adds complexity to the Lambda financials ↩︎ ... End-to-end observability and real-time error tracking for AWS applications.
Amazon Web Services
aws.amazon.com › compute › aws lambda › pricing
AWS Lambda Pricing
5 days ago - When Provisioned Concurrency is enabled and executed for your function, you also pay for Requests and Duration based on the prices below. If your function exceeds the configured concurrency, you will be billed for excess function execution at the rate outlined in the AWS Lambda Pricing section above.
Pricing of lambda provisioned concurrency
Hello, You may find this doc helpful in accurately estimating and calculating your concurrency: https://go.aws/3Wn9KYQ . If not, feel free to reach out to Support for additional insight: http://go.aws/support-center . - Marc O. More on reddit.com
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May 1, 2024AWS Lambda provisioned concurrency vs keeping a lambda warm with events?
For events, keep in mind that pinging your lambda function with scheduled events will probably only keep one container warm, so if multiple requests are made to the function in parallel by users then some requests may still incur a cold start. If you want to keep more containers warm, you can invoke a separate lambda function on a schedule which concurrently makes multiple requests to your service. More on reddit.com
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May 20, 2021Accidentally pre-announced: Provisioned Concurrency for Lambda Functions
My way too excited bullet points about it (disclaimer: I work for Lambda): https://twitter.com/StylerMyers/status/1202033511885983745?s=19 More on reddit.com
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September 5, 2019API Gateway + Lambda Function concurrency and cold start issues
> I'm also using the default memory of 128MB. Is that too low? Cpu is proportionnal to memory for lambdas, so yes, even if you do not need more memory, configuring more of if with increase the available cpu and make the responses faster. ( and so it will also lower your concurrency , which will sove another problem you have ) More on reddit.com
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October 6, 2023Videos
17:45
AWS Lambda Concurrency | Reserved Concurrency | Provisioned ...
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AWS Lambda Concurrency Explained - YouTube
17:51
How does AWS Lambda Concurrency Work? - YouTube
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AWS Lambda Concurrency - Provisional & Reserved - YouTube
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AWS Lambda Provisioned Concurrency | Lambda Scaling and Concurrency ...
Lumigo
lumigo.io › home › aws lambda provisioned concurrency: the end of cold starts
AWS Lambda Provisioned Concurrency: The End of Cold Starts - Lumigo
June 25, 2024 - Next, select the function alias previously selected in the Alias drop-down menu. Specify a required value for Provisioned Concurrency – this number defines the number of function instances that run continuously. Select Save. Additional costs warning – AWS Lambda charges additional fees for provisioned concurrency.
Reddit
reddit.com › r/aws › pricing of lambda provisioned concurrency
r/aws on Reddit: Pricing of lambda provisioned concurrency
May 1, 2024 -
I was trying to setup provisioned concurrency in AWS lambda, and wanted some guidance on the cost overhead that I'll bear.
Let's say I decide to setup provisioned concurrency as 5.
My memory size 3072 MB.
Estimated total cost per month: $0.00000005 (cost per ms for 3072 mb) * 1000*60*60*24*30 (total ms in a month) * 5 (provisioned concurrency) = 648 $
A) is this calculation correct?
B) With every update do I have to deploy a new version and setup concurrency?
Top answer 1 of 2
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Hello, You may find this doc helpful in accurately estimating and calculating your concurrency: https://go.aws/3Wn9KYQ . If not, feel free to reach out to Support for additional insight: http://go.aws/support-center . - Marc O.
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Calc looks correct to me, but don't forget to factor in the cost of cold starts and potential idle time. And yeah, updating your Lambda function does require a new version deployment and re-configuring concurrency.
How-To Geek
howtogeek.com › home › cloud › should you use provisioned concurrency for aws lambda functions?
Should You Use Provisioned Concurrency for AWS Lambda Functions?
July 7, 2023 - Overall, provisioned concurrency doesn't cost much more than regular Lambda functions. You can use AWS's Pricing Calculator to figure out how much it will cost you personally.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › understanding lambda function scaling › configuring provisioned concurrency for a function
Configuring provisioned concurrency for a function - AWS Lambda
Configuring provisioned concurrency incurs additional charges to your AWS account. This topic details how to manage and configure provisioned concurrency. For a conceptual overview of these two types of concurrency controls, see Reserved concurrency and provisioned concurrency. For more information on configuring reserved concurrency, see Configuring reserved concurrency for a function. Lambda functions linked to an Amazon MQ event source mapping have a default maximum concurrency.
Cloudchipr
cloudchipr.com › blog › aws-lambda-pricing
AWS Lambda Pricing Breakdown: Ultimate Guide 2025
November 6, 2024 - If your function exceeds the configured concurrency, additional executions will be billed at the standard rates outlined in the general Lambda pricing. Provisioned Concurrency can be enabled on functions running both x86 and Arm architectures. Imagine you’re a retailer running a large sale on Cyber Monday, with increased customer support requests through a mobile app. You deploy an NLP model (e.g., BERT) using AWS Lambda with Provisioned Concurrency to handle the high traffic and ensure fast response times.
Cloudforecast
cloudforecast.io › home › aws pricing & cost optimization › complete aws lambda pricing and optimization guide
Complete AWS Lambda Pricing and Optimization Guide
September 28, 2023 - AWS provides a pricing calculator to estimate the cost of using Lambda for your applications. The below estimate provides pricing calculations for a sample application with the following settings: ... The same pricing calculator can also provide an estimate for provisioned concurrency.
AWS Fundamentals
awsfundamentals.com › blog › aws-lambda-pricing-a-complete-guide-to-understanding-the-cost-of-the-serverless-service
AWS Lambda Pricing: A Complete Guide
But provisioned concurrency can also help reduce costs. The GB second is much cheaper (about 70%) as with normal Lambda functions. However, you need to pay for it all the time. This approach only works if your Lambda function is almost never idle.
Medium
aws.plainenglish.io › what-is-provisioned-concurrency-and-when-should-you-use-it-6eab44e9cd46
What is Provisioned Concurrency- and When Should You Use It? | by Joseph Schambach | AWS in Plain English
June 2, 2025 - Provisioned concurrency is kind of like paying ahead to keep the lights on for your Lambda function. In this article, I’ll try to break down provisioned concurrency in an easily digestible way, then discuss when you should use it, and lastly show you how to configure your own provisioned concurrency in AWS.
AWS
aws.amazon.com › blogs › compute › new-for-aws-lambda-predictable-start-up-times-with-provisioned-concurrency
New for AWS Lambda – Predictable start-up times with Provisioned Concurrency | Amazon Web Services
July 10, 2020 - It’s simply a matter of configuring your function parameters via the AWS Management Console or CLI, and the Lambda service manages the rest. Provisioned Concurrency adds a pricing dimension to the existing dimensions of Duration and Requests.
Medium
mark-sailes.medium.com › the-other-feature-of-aws-lambda-provisioned-concurrency-saving-money-24e4e5086e1b
The Other Feature of AWS Lambda Provisioned Concurrency — Saving Money | by Mark Sailes | Medium
April 16, 2021 - ... Provisioned Concurrency is billed slightly differently, it has 3 components. Requests and duration are the same as regularly billing. Provisioned concurrency also has a set fee for each GB-second you reserve.
Pump
pump.co › home › blog › understanding the aws lambda pricing and costs
Understanding the AWS Lambda Pricing and Costs
November 6, 2024 - Logs of the activity suggest these are not charged under the free tier, meaning that some additional costs will be incurred with Provisioned Concurrency. Lambda has additional enhancements, such as SnapStart and Lambda@Edge. Using cold start optimization, SnapStart employs pre-initialized snapshots and thus improves start-up performance for latency-sensitive apps to below 1 second.
Ran The Builder
ranthebuilder.cloud › post › optimize-aws-lambda-with-dynamic-provisioned-concurrency
Optimize AWS Lambda with Dynamic Provisioned Concurrency
July 8, 2024 - While provisioned concurrency offers a reliable solution for minimizing latency in AWS Lambda functions, it can have a negative side effect of increased costs, as observed by our platform engineering group at CyberArk.
Metal Toad
metaltoad.com › blog › lambda-concurrency
Lambda Concurrency: Optimize AWS Performance, Cost & Throughput | Metal Toad
Start by identifying which functions actually need provisioned concurrency. Not every Lambda function is created with equal focus on user-facing APIs, real-time data processing functions, and any workload where consistent low latency is critical. Background processing jobs and infrequent administrative tasks rarely justify the additional cost. The configuration process itself is straightforward through the AWS Console, CLI, or Infrastructure as Code tools like CloudFormation or Terraform.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › understanding lambda function scaling
Understanding Lambda function scaling - AWS Lambda
Understanding and visualizing concurrencyCalculating concurrency for a functionUnderstanding reserved concurrency and provisioned concurrencyUnderstanding concurrency and requests per secondConcurrency quotas · Concurrency is the number of in-flight requests that your AWS Lambda function is ...
CloudZero
cloudzero.com › home › blog › a simple guide to aws lambda pricing and cost management
A Simple Guide To AWS Lambda Pricing And Cost Management
December 12, 2024 - When enabled, provisioned concurrency keeps your functions warm. This ensures they are ready to respond immediately, reducing latency. You’re charged based on the concurrency level and the amount of memory allocated to the function, with additional charges for requests and duration. The following formula will help you calculate your AWS Lambda costs in GB-seconds:
Lumigo
lumigo.io › guides › aws lambda 101 › aws lambda cost factors, cost comparisons and optimization [2024]
AWS Lambda Cost Factors, Cost Comparisons and Optimization [2024]
August 30, 2024 - Additional storage can be configured between 512 MB and 10,240 MB in 1 MB increments. ... Ephemeral storage is priced at $0.0000000309 per GB-second. This means you pay for the storage multiplied by the execution time.