Work out namespace quota instantly with clear inputs, formula shown and shareable results.
ResourceQuota caps the total requests a namespace may make, which is how a shared cluster stops one team consuming everything. Dividing available capacity evenly is the starting point; because teams rarely peak simultaneously, quotas are usually overcommitted to around 150 percent of a strict share, with monitoring on actual aggregate usage rather than allocated quota.
Quota allocation
available = cluster capacity x (1 - system reserve); per namespace = available / namespaces; overcommitted quota = per namespace x factor
Both, with different values. Quota on requests controls scheduling capacity; quota on limits controls the worst-case burst a namespace can create.
New pods are rejected at admission with a clear error. That is far better than the alternative of one namespace starving the cluster.