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Knowledge Base & Operational DocumentationWhy Does a Hosted Website Return an Error Only During Large File Uploads?
Large uploads can exceed request-size limits, execution timeouts, proxy buffering, disk space, or account resource limits. Smaller uploads may work, leaving users without a clear indication of which threshold was reached.
What to check
Record file size and time, inspect application and proxy logs, request limits, temporary storage, PHP or server execution settings, and account resource graphs. Determine whether failure occurs before the app receives the file or during processing.
Recommended next step
Set limits that match the business need and available capacity, provide progress and clear error guidance, and consider resumable or direct-to-storage uploads for large files. Test boundary sizes without overwhelming production resources.
How Informatix Systems can help
Informatix Systems provides cloud hosting and server management services. We can assess the environment, trace the failure across relevant components, and help plan a practical next step. Contact us with the service involved, when the issue began, and non-sensitive error details.