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This document lists the quotas and system limits that apply to
App Hub.
Quotas specify the amount of a countable, shared resource that you
can use. Quotas are defined by Google Cloud services such as
App Hub.
System limits are fixed values that cannot be changed.
Google Cloud uses quotas to help ensure fairness and reduce
spikes in resource use and availability. A quota restricts how much of a
Google Cloud resource your Google Cloud project can use. Quotas
apply to a range of resource types, including hardware, software, and network
components. For example, quotas can restrict the number of API calls to a
service, the number of load balancers used concurrently by your project, or the
number of projects that you can create. Quotas protect the community of
Google Cloud users by preventing the overloading of services. Quotas also
help you to manage your own Google Cloud resources.
The Cloud Quotas system does the following:
Monitors your consumption of Google Cloud products and services
In most cases, when you attempt to consume more of a resource than its quota
allows, the system blocks access to the resource, and the task that
you're trying to perform fails.
Quotas generally apply at the Google Cloud project
level. Your use of a resource in one project doesn't affect
your available quota in another project. Within a Google Cloud project, quotas
are shared across all applications and IP addresses.
There are also system limits on App Hub resources.
System limits can't be changed.
Allocation quotas
App Hub enforces the following usage limits:
Resource
Description
Limit
Scope
Service project
Maximum number of projects that can be attached to a host project.
25
Per host project
Regional applications
Maximum number of regional applications that can be created in a region in the host or management project.
100
In a single region per host or management project
Regional registered services
Maximum number of services that can be registered into a regional application in the host or management project.
500
In a single region per application per host or management project
Regional registered workloads
Maximum number of workloads that can be registered into a regional application in the host or management project.
500
In a single region per application per host or management project
Global applications
Maximum number of global applications that can be created in the host or management project.
100
Per host or management project
Global registered services
Maximum number of services that can be registered into a global application in the host or management project.
500
Globally per application per host or management project
Global registered workloads
Maximum number of workloads that can be registered into a global application in the host or management project.
500
Globally per application per host or management project
Rate quotas
The following quotas apply to App Hub requests:
Quota
Description
Value
Scope
API requests per minute
Maximum number of requests that can be made from a host, management, or service project. This is a project-wide aggregation of global and regional requests per minute.
12000
Per host project, service project, or management project
Regional API requests per minute
Maximum number of regional requests that can be made from a host, management, or service project.
1200
In a single region per host or management project
API requests per minute
Maximum number of global requests that can be made from a host, management, or service project.
1200
Globally per host or management project
Edit your quota
To adjust most quotas, use the Google Cloud console.
For more information, see
Request a quota adjustment.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-25 UTC."],[[["\u003cp\u003eApp Hub quotas limit the amount of shared resources a Google Cloud project can use, helping to ensure fairness and manage resource consumption.\u003c/p\u003e\n"],["\u003cp\u003eSystem limits are fixed values that are unchangeable and apply to App Hub resources.\u003c/p\u003e\n"],["\u003cp\u003eApp Hub enforces allocation quotas, such as a maximum of 25 service projects per host project and up to 100 regional or global applications.\u003c/p\u003e\n"],["\u003cp\u003eRate quotas are enforced for App Hub API requests, allowing for up to 12,000 requests per minute per host or service project.\u003c/p\u003e\n"],["\u003cp\u003eYou can request adjustments to most quotas through the Google Cloud console.\u003c/p\u003e\n"]]],[],null,["# Quotas and limits\n\nThis document lists the quotas and system limits that apply to\nApp Hub.\n\n- *Quotas* specify the amount of a countable, shared resource that you can use. Quotas are defined by Google Cloud services such as App Hub.\n- *System limits* are fixed values that cannot be changed.\n\nGoogle Cloud uses quotas to help ensure fairness and reduce\nspikes in resource use and availability. A quota restricts how much of a\nGoogle Cloud resource your Google Cloud project can use. Quotas\napply to a range of resource types, including hardware, software, and network\ncomponents. For example, quotas can restrict the number of API calls to a\nservice, the number of load balancers used concurrently by your project, or the\nnumber of projects that you can create. Quotas protect the community of\nGoogle Cloud users by preventing the overloading of services. Quotas also\nhelp you to manage your own Google Cloud resources.\n\nThe Cloud Quotas system does the following:\n\n- Monitors your consumption of Google Cloud products and services\n- Restricts your consumption of those resources\n- Provides a way to [request changes to the quota value](/docs/quotas/help/request_increase) and [automate quota adjustments](/docs/quotas/quota-adjuster)\n\nIn most cases, when you attempt to consume more of a resource than its quota\nallows, the system blocks access to the resource, and the task that\nyou're trying to perform fails.\n\nQuotas generally apply at the Google Cloud project\nlevel. Your use of a resource in one project doesn't affect\nyour available quota in another project. Within a Google Cloud project, quotas\nare shared across all applications and IP addresses.\n| **Note:** Quotas are the same for App Hub host and management projects. To learn about the differences between project types in App Hub, see [Concepts and data model](/app-hub/docs/overview#datamodel).\n\n\nThere are also *system limits* on App Hub resources.\nSystem limits can't be changed.\n\nAllocation quotas\n-----------------\n\nApp Hub enforces the following usage limits:\n\nRate quotas\n-----------\n\nThe following quotas apply to App Hub requests:\n\nEdit your quota\n---------------\n\nTo adjust most quotas, use the Google Cloud console.\nFor more information, see\n[Request a quota adjustment](/docs/quotas/help/request_increase)."]]
