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# Application and rate limit guidelines
GitLab, like most large applications, enforces limits within certain features.
The absences of limits can affect security, performance, data, or could even
1. Limits are required if the absence of the limit matches severity 1 - 3 in the severity definitions for [limit-related bugs](https://about.gitlab.com/handbook/engineering/quality/issue-triage/#limit-related-bugs).
1. [GitLab application limits](../administration/instance_limits.md) documentation must be updated anytime limits are added, removed, or updated.