Backend & systems·Scaling and load management
one customer's enormous batch job makes every other customer's requests slow, on shared infrastructure they cannot see.
Noisy neighbour
Also calledmulti-tenancy isolation
One tenant's resource consumption degrading others on shared infrastructure. It is the defining operational problem of multi-tenancy, and it appears at every layer: CPU, connection pools, cache space, database locks. Per-tenant quotas, bulkheads and fair queueing are the mitigations; "we will notice" is not.