I gave a presentation titled "I didn't understand Lambda MicroVMs at all, so I tried thinking from scratch about where to use them" #jawsugibaraki #jawsug
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Hello, I'm Tsukuboshi (tsukuboshi0755)!
At the JAWS-UG Ibaraki #17 Autumn Favorite AWS Services LT Festival! held on 2026/9/30, I gave an LT talk titled "Lambda MicroVMs Were Too Confusing, So I Thought From Scratch About Where to Use Them"!
In this article, I'd like to share my presentation materials and provide supplementary notes on the talk content!
What is JAWS-UG Ibaraki?
It's a volunteer community that holds AWS-centered networking events and study sessions in Ibaraki on a non-profit basis.
This time it was a festival-style LT event where speakers each talked about their favorite AWS services.
LT Materials
Supplementary Notes
In the LT, I organized the use cases for AWS Lambda MicroVMs around the axis of "whether you need a disposable isolated environment that can be stopped and resumed while retaining state."
AWS Lambda MicroVMs have VM-level isolation via Firecracker, and can be suspended while retaining memory and disk state during idle periods.
On the other hand, since a single MicroVM terminates after a maximum of 8 hours including time spent suspended, it's designed not for always-on workloads, but rather for use cases where VMs are provisioned and discarded per session or job.
Resource limits and authentication/network specifications are summarized in the following official documentation.
If you want to get hands-on and verify the behavior yourself, the following articles are also helpful.
References
Finally
This time, I introduced the content of my LT talk about where to use AWS Lambda MicroVMs.
Starting from a state of complete confusion, by laying out the specifications one by one, the differences from Lambda functions and the boundary between suitable and unsuitable use cases became clear.
While it's a service that requires choosing the right use case, I think it's a powerful service when the conditions align.
Please consider adding AWS Lambda MicroVMs as a candidate whenever you need a disposable isolated environment that can retain state!
That's all from Tsukuboshi (tsukuboshi0755)!
