isolate noisy pulsar tenants using namespace resource quotas and resourcegroups
domain: pulsar.apache.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Set a backlog quota per namespace defining the retention limit and the policy action, such as blocking the producer or dropping the oldest messages, once reached.
Create a ResourceGroup with publish and dispatch rate limits in bytes per second and messages per second, and associate it with the tenant or namespace.
Set per-namespace dispatch rate limits directly as a simpler alternative to ResourceGroups when only one tenant needs throttling.
Configure namespace-level message TTL and isolation policies to bound how much storage and how many brokers a given tenant's bundles can consume.
Monitor per-namespace bundle metrics to confirm a throttled tenant's bursts no longer starve other tenants sharing the same brokers.
Known gotchas
A backlog quota's block-producer action stops that namespace's publishers entirely once the quota is hit; choosing the drop-oldest action instead risks silent data loss, so pick the action deliberately per tenant's tolerance.
ResourceGroup quotas are a broader mechanism than plain dispatch-rate policies; mixing both on the same namespace can make it unclear which limit is actually being enforced.
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