How to improve performance on file uploading to Sharepoint library via Graph API?

Question

We have a program that utilises the graph API to upload a file to Sharepoint library. The issue is this runs with random latency. Sometimes it's a few secs, sometimes it's a few mins and sometimes it's 20 mins plus. Is there anything that could improve the performance?

Answer 1

Hi @Alec Tang ,

Thank you for posting in this community.

This is because the file upload limit is set in the service and cannot be changed. When uploading files larger than 250 MB, use file chunking. This approach breaks the file into smaller chunks and uploads them sequentially. The operation in the Graph API provides an upload URL containing a session identifier. You can then use requests to upload chunks to this URL. Ensure that each chunk starts with the range specified in the “nextExpectedRanges” value from the previous response. /createUploadSessionPUTUse a chunk size divisible by 320 KiB (327,680 bytes) for efficient handling1.

Reference:https://learn.microsoft.com/en-us/answers/questions/1574811/what-is-the-actual-size-limit-for-uploading-files

Experiment with different chunk sizes to find the optimal balance between performance and reliability. Smaller chunks may reduce latency but increase the number of requests, while larger chunks may improve efficiency but increase the risk of failure.

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