# Quotas and system limits

Manufacturing Data Engine uses quotas and system limits to maintain fair resource
allocation, prevent service overloads, and help you manage resource use.

The differences between these approaches are as follows:

- *Quotas* have default values, but you can typically request adjustments.
- *System limits* are fixed values that can't be changed.

Google Cloud uses quotas to help maintain 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
- Restricts your consumption of those resources
- Provides a way to [request changes to the quota value](https://docs.cloud.google.com/docs/quotas/help/request_increase) and [automate quota adjustments](https://docs.cloud.google.com/docs/quotas/quota-adjuster)

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.


For more information, see the
[Cloud Quotas overview](https://docs.cloud.google.com/docs/quotas/overview).

## Quotas

MDE is a solution built on top of different Google Cloud products.
For detailed information, see the respective
Google Cloud products quotas pages:

- [Google Kubernetes Engine (GKE)](https://docs.cloud.google.com/kubernetes-engine/quotas)
- [Pub/Sub](https://docs.cloud.google.com/pubsub/quotas)
- [Dataflow](https://docs.cloud.google.com/dataflow/quotas)
- [BigQuery](https://docs.cloud.google.com/bigquery/quotas)
- [Bigtable](https://docs.cloud.google.com/bigtable/quotas)
- [Cloud Storage](https://docs.cloud.google.com/storage/quotas)

## Request a quota adjustment

To adjust most quotas, use the Google Cloud console.
For more information, see
[Request a quota adjustment](https://docs.cloud.google.com/docs/quotas/help/request_increase).