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A concise architecture note for Heroku Review Apps covering requirements, minimal pipeline design, trust boundaries, operational checks, failure modes and when to change the design.
Heroku's cheaper dynos sleep after ~30 minutes idle, causing slow cold starts. Here's how keep-alive pings work, their limits, and when upgrading is the right call.
Learn how to resolve application bottlenecks on Heroku by choosing between horizontal and vertical scaling, managing database connection limits, and handling ephemeral filesystems.
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