# GCP Pub/Sub Optimization | Cloud Efficiency Hub

Canonical: https://www.pointfive.co/efficiency-hub/cloud-services/gcp-pub-sub

1 documented GCP Pub/Sub cost inefficiency, with how to detect it and how to fix it.

[Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) 

1 documented GCP Pub/Sub cost inefficiency, with how to detect it and how to fix it.

## 1 inefficiency

[All services](https://www.pointfive.co/efficiency-hub#browse-by-service)

- GCP Pub/Sub  CER-0492

### [Unacknowledged Message Backlog in Abandoned Pub/Sub Subscriptions](https://www.pointfive.co/efficiency-hub/inefficiencies/unacknowledged-message-backlog-in-abandoned-pub-sub-subscriptions)

Every Pub/Sub subscription attached to a topic keeps its own backlog of the messages published to that topic until they are acknowledged or expire. When a consumer is retired, broken or scaled too small, its subscription keeps receiving...

Other

## More GCP services

- [GCP Compute Engine  14](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-compute-engine)

- [GCP BigQuery  9](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-bigquery)

- [GCP GKE  9](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-gke)

- [GCP Cloud SQL  8](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-cloud-sql)

- [GCP GCS  6](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-gcs)

- [GCP Cloud Logging  5](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-cloud-logging)

- [GCP Vertex AI  5](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-vertex-ai)

- [GCP Dataflow  4](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-dataflow)

- [GCP Cloud Run  3](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-cloud-run)

- [GCP Cloud Memorystore  2](https://www.pointfive.co/efficiency-hub/cloud-services/gcp-cloud-memorystore)

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Source: the public page above. Product screenshots and illustrative interfaces are examples, not live customer data.