# Delta Lake optimization | Cloud Efficiency Hub

Canonical: https://www.pointfive.co/efficiency-hub/cloud-services/delta-lake

2 documented Delta Lake cost inefficiencies, each with how to detect it and how to fix it.

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

2 documented Delta Lake cost inefficiencies, each with how to detect it and how to fix it.

## 2 inefficiencies

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

- Delta Lake  CER-0177

### [Missing Delta Optimization Features for High-Volume Tables](https://www.pointfive.co/efficiency-hub/inefficiencies/missing-delta-optimization-features-for-high-volume-tables)

In many Databricks environments, large Delta tables are created without enabling standard optimization features like liquid clustering (or, on older tables, partitioning and Z-Ordering). Without these, queries scanning large datasets may...

Storage

- Delta Lake  CER-0529

### [Unvacuumed Delta Tables Retaining Unreferenced Data Files](https://www.pointfive.co/efficiency-hub/inefficiencies/unvacuumed-delta-tables-retaining-unreferenced-data-files)

Delta Lake never modifies data files in place. Every UPDATE, DELETE, MERGE, overwrite and OPTIMIZE writes new files and marks the old ones as removed in the transaction log, but the old files stay in cloud object storage so earlier table...

Storage

## More Databricks services

- [Databricks Clusters  7](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-clusters)

- [Databricks Compute  5](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-compute)

- [Databricks SQL  4](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-sql)

- [Databricks  3](https://www.pointfive.co/efficiency-hub/cloud-services/databricks)

- [Databricks Serverless Compute  2](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-serverless-compute)

- [Databricks Workflows  2](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-workflows)

- [Interactive Clusters  1](https://www.pointfive.co/efficiency-hub/cloud-services/interactive-clusters)

- [Databricks Model Serving  1](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-model-serving)

- [Databricks AI Search  1](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-ai-search)

- [Databricks Lakeflow Pipelines  1](https://www.pointfive.co/efficiency-hub/cloud-services/databricks-lakeflow-pipelines)

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