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Can I Transfer Apps From Private Spaces to Common Runtime? You want to transfer an existing Private Spaces application into the Common Runtime.
How do I access Router 2.0, the new Common Runtime router? You want to enable, disable or of check the status of [Router 2.0](https://devcenter.heroku.com/articles/heroku-runtime-router-2-0) for a particular Common Runtime application. Router 2.0 unlocks [HTTP/2 in the Common Runtime](https://devcenter.heroku.com/articles/heroku-runtime-router-2-0#http-2-with-router-2-0). If you would like to use HTTP/2 on a Common Runtime app, you must enable Router 2.0.
Common Runtime Legacy Router End-of-Life FAQ [Router 2.0](https://devcenter.heroku.com/articles/heroku-runtime-router-2-0) is generally available and the default router for any new Common Runtime application. Additionally, 94% of Common Runtime apps are already using the new router. Router 2.0 introduces several performance and security improvements, including HTTP/2 support and keepalives to dynos. The legacy router end-of-life (EOL) is scheduled for **Summer 2025** and all common runtime customers will be upgraded to Router 2.0 over the next few weeks. In general, **the migration to Router 2.0 is an automatic switch that will happen transparently for customer applications**. No action is required on behalf of the customer. However, if a customer would like to validate the new router themselves before the automatic migration, they may do so by following [How do I access Router 2.0?](https://help.heroku.com/JMLSBDF0/how-do-i-access-router-2-0-the-new-common-runtime-router). If a customer is encountering issues using the new router, they may disable it and fall back to the legacy router.
Why my Puma app on Common Runtime suddenly started recording H12s and H27s? Without a change in the app code, my Heroku app on Cedar-generation Common Runtime running Puma as the web server suddenly started recording higher response time along with increased number of [H12 - Request timeout](https://devcenter.heroku.com/articles/error-codes#h12-request-timeout) and [H27 - Client Request Interrupted](https://devcenter.heroku.com/articles/error-codes#h27-client-request-interrupted) errors.
How do I switch the dyno hosts for apps in Common Runtime and Private Spaces? I'm seeing poor response times/performance issues with a single dyno.
What is an acceptable amount of Dyno load? Dashboard Metrics displays Dyno Load, measured as "1m Load Average" and "1m Load Max". The method of taking these measurements is explained on our Dev Center (https://devcenter.heroku.com/articles/metrics#dyno-load), but this does not illustrate what you should expect my application to run at.
Where can I view logs for Container based apps? I'm not seeing the logs I expect from an app deployed via the container registry and runtime.
How do I move my existing Heroku Connect connection into a private space? You have an app in the Common Runtime that uses the Heroku Connect add-on, and you need to move it to a Private Space.
How can I increase the number of apps I can run in a Private Space? I can't create more than 25 apps in my Private Space and I need more.
Release Phase command for a Container Registry & Runtime app in Private Space fails with R99 [Release Phase](https://devcenter.heroku.com/articles/release-phase) command consistently fails when I try to deploy a [Container Registry & Runtime](https://devcenter.heroku.com/articles/container-registry-and-runtime) app to a Private Space. Checking the app logs with the Heroku CLI command `heroku logs`, I see something like below. ``` heroku release.1234 - - Error R99 (Platform error) -> Failed to launch the dyno within 60 seconds ```

Dev Center articles 3

Migrating Apps From the Common Runtime to a Private Space This guide helps you migrate your apps from the Common Runtime to Private Spaces with minimal downtime.
Connecting to Common Runtime Heroku Postgres Databases from an External Resource Considerations for connecting to a Heroku Postgres database from outside of Heroku, including SSL and credential details.
Optimizing Python Application Concurrency Guidelines for getting the best performance out of every dyno when running Python applications.

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