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limits.mdx

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title Limits
description There are some hard and soft limits that you might hit.

import RateLimitHitUseBatchTrigger from "/snippets/rate-limit-hit-use-batchtrigger.mdx";

Concurrency limits

Pricing tier Limit
Free 5 concurrent runs
Hobby 25 concurrent runs
Pro 100+ concurrent runs

If you need more than 100 concurrent runs on the Pro tier, you can request more by contacting us via email or Discord.

Rate limits

Generally speaking each SDK call is an API call.

Limit Details
API 1,500 requests per minute

Queued tasks

The number of queued tasks by environment.

Limit Details
Dev At most 500
Staging At most 10 million
Prod At most 10 million

Schedules

Pricing tier Limit
Free 5 per project
Hobby 100 per project
Pro 1,000+ per project

When attaching schedules to tasks we strongly recommend you add them in our dashboard if they're "static". That way you can control them easily per environment.

If you add them dynamically using code make sure you add a deduplicationKey so you don't add the same schedule to a task multiple times. If you don't your task will get triggered multiple times, it will cost you more, and you will hit the limit.

If you're creating schedules for your user you will definitely need to request more schedules from us.

Task payloads and outputs

Limit Details
Single trigger payload Must not exceed 3MB
Batch trigger payload The total of all payloads must not exceed 1MB
Task outputs Must not exceed 10MB

Payloads and outputs that exceed 512KB will be offloaded to object storage and a presigned URL will be provided to download the data when calling runs.retrieve. You don't need to do anything to handle this in your tasks however, as we will transparently upload/download these during operation.

Batch size

A single batch can have a maximum of 500 items.

Log retention

Pricing tier Limit
Free 1 day
Hobby 7 days
Pro 30 days

Log size

We limit the size of logs to prevent oversized data potentially causing issues.

Attribute Limits

  • Span Attribute Count Limit: 256
  • Log Attribute Count Limit: 256
  • Span Attribute Value Length Limit: 1028 characters
  • Log Attribute Value Length Limit: 1028 characters

Event and Link Limits

  • Span Event Count Limit: 10
  • Link Count Limit: 2
  • Attributes per Link Limit: 10
  • Attributes per Event Limit: 10

I/O Packet Length Limit

128 KB (131,072 bytes)

Attribute Clipping Behavior

  • Attributes exceeding the value length limit (1028 characters) are discarded.
  • If the total number of attributes exceeds 256, additional attributes are not included.

Attribute Value Size Calculation

  • Strings: Actual length of the string
  • Numbers: 8 bytes
  • Booleans: 4 bytes
  • Arrays: Sum of the sizes of all elements
  • Undefined or null: 0 bytes

Alerts

An alert destination is a single email address, Slack channel, or webhook URL that you want to send alerts to. If you're on the Pro and need more than 100 alert destinations, you can request more by contacting us via email or Discord.

Pricing tier Limit
Free 1 alert destination
Hobby 3 alert destinations
Pro 100+ alert destinations

Machines

The default machine is small-1x which has 0.5 vCPU and 0.5 GB of RAM. You can optionally configure a higher spec machine which will increase the cost of running the task but can also improve the performance of the task if it is CPU or memory bound.

See the machine configurations for more details.

Team members

Pricing tier Limit
Free 5 team members
Hobby 5 team members
Pro 25+ team members