Quotas and limits

This document lists content limits and request quotas for Data Catalog. These limits apply to each Google Cloud console project and organization and are shared across all applications and IP addresses.

Content limits

The Data Catalog API enforces the following content limits:

Content Limit Value
Maximum number of entries
(search results latency can increase when exceeded)
MB per entry 10 MB
Maximum number of search results per page 1000
Fields per tag template 500
Length of a field name in a tag template 512 bytes
Length of a resource name for a tag template 512 bytes
Length of a string field in a tag template 10000 bytes
Maximum number of enum values in a tag template 100
Tags per entry 1000
Maximum sum of two numbers:
  • Number of fields in all tags attached to an entry
  • Number of columns in the entry's optional schema
Maximum number of policy tags per taxonomy 100
Maximum number of taxonomies per project 40
Maximum depth of the policy tags tree
(100 policy tags per taxonomy still applies)
Length of a policy tag name 200 bytes
Number of starred entries per user 200

Business metadata limits

  • A single data entry supports a maximum of 15 data stewards.
  • The maximum size of the rich text in the overview, without including the size of the images, is 100 KB.
  • If you include images, the total size of the rich text including the images must not exceed 10 MB.

Request quotas

The QPM (queries per minute) of projects in an organization are added together to calculate the organization's QPM.

Data Catalog uses QPM quotas to prevent service overload rather than control request workload distribution among projects. Therefore, both project and organization have the same default QPM quotas. In other words, if an organization has multiple projects and the request workload of one of them approaches the default organization (and the same project) quota, this project may impact the potential workload of the other projects in the organization.

You can request to adjust organization and project quotas separately. For more information, see Working with quotas.

QPM quota Default value
Read 6000
Write 1500
Search 900

Other quotas

Quota increases

Currently, Data Catalog does not support quota increases.