> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/mobile-sdk-setup-permissions-and-crashes/health-connect-oom-large-hr-window.md). # Why does Health Connect heart rate sync cause OOM crashes? **Out-of-memory crashes reading Health Connect heart-rate data usually come from requesting too large a window at once**, since HR samples are very dense. To fix it: * **Fetch in small chunks** (1-5 days). * Request **one payload type at a time**, sequentially. * Consider enabling `largeHeap` in the build config. * **Send data to a webhook destination** instead of handling it in-app, which avoids holding large payloads in memory. See the [Android (Kotlin) SDK reference](https://docs.tryterra.co/reference/health-and-fitness-api/sdk-references/android-kotlin) for the relevant calls. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.tryterra.co/faq/help-topics/data-api-sdk/mobile-sdk-setup-permissions-and-crashes/health-connect-oom-large-hr-window.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.