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- Dynos (app containers)
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Databases & Data Management
- Heroku Postgres
  - Postgres Basics
  - Postgres Performance
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  - Postgres Availability
  - Postgres Special Topics
- Heroku Redis
- Apache Kafka on Heroku
- Other Data Stores

Monitoring & Metrics
- Logging

App Performance

Add-ons
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Security
- App Security
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- Compliance

Heroku Enterprise
- Private Spaces
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  - Heroku Connect Administration
  - Heroku Connect Reference
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Extending Heroku
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Accounts & Billing

Troubleshooting & Support

Pg_stat_statements is now enabled by default on all Heroku Postgres non-hobby databases 9.2 and up

Change effective on 11 February 2014

Pg_stat_statements is now turned on for all non-hobby Heroku Postgres databases running PostgreSQL version 9.2 or up.

Rails 4.1.0 RC1 Support Heroku Platform API resources now expose stability