Cloudflare Workflows Limits Get a Big Boost: 50K Parallel, 2M Queued!

Hey there, it's me, Shiichan! Today Cloudflare gave Workflows a nice power-up, and the numbers jumped up so much that I can't help getting excited!

Cloudflare Changelog developers.cloudflare.com

What was announced?

On the Cloudflare Changelog, they announced that the limits for Workflows instances have been raised. Three things got loosened at once: how many can run at the same time, how fast you can create them, and how many can sit waiting.

The story so far

Until now, you could run at most 10,000 instances in parallel, and create only 100 per second per account. The queued instances waiting in line were also capped at 1 million per Workflow. For folks who wanted to run tons of big jobs, that could feel a little tight.

What changes

With the new limits, here is how things shift:

• Instances running in parallel: 10,000 -> 50,000 (5x!)
• Creation rate per account: 100/second -> 300/second
• Queued instances per Workflow: 1 million -> 2 million (2x!)

That means even batch processing or event-driven workloads that need to scale in a hurry are less likely to bump into the ceiling.

Dive Deep

The creation rate has two layers: up to 300 per second across the whole account, while each individual Workflow still keeps its 100-per-second limit. So if you spread the work across multiple Workflows, you can really make use of the account-wide budget.

The "queued instances" here are instances that have been created or awoken and are waiting for a concurrency slot. Since this budget grew to 2 million, a sudden spike is less likely to drop anything.

This increase applies to everyone on the Workers Paid plan. For the finer details, take a look at the Workflows limits documentation.

Wrap-up

• On the Cloudflare Changelog, the instance limits for Workflows were raised
• Parallel execution is now 50,000, the creation rate is 300/second per account (still 100/second per Workflow), and queued instances go up to 2 million
• It applies to everyone on the Workers Paid plan
• A welcome update for anyone who wants to crank through large-scale workflows!