Nextjs app in Azure appservice no-space error

This is in nextjs 14.2

A very cool nextjs app that has millions of pages(dynamic) I created for a business ran into issue with azure appservice saying no space to deploy also the server logs were also saying no space to keep the image and fetch caches

Several blogs and discussions on the web points to a single reason and solution that the temp storage is filled and we need to restart the server. I did that and did not work for me.

Then looking into the actual quota usage of the appservice plan I see that 99.9% of the disc is full. Thats a surprise because 250GB is not a small drive.

The reason is the fetch cache itself. All the request from crawlers are creating lots of fetch cache documents. The ls command did not even finish to show any info. not the` du -sh` could help. The old cache will not be cleared by nextjs in 14.2

Finally the option is to disable cache and manually remove allowing more space for deployments.

In Nextjs 15 there is a solution to this which at the time of writing this is in experimental. https://nextjs.org/docs/app/api-reference/functions/cacheLife. This allows us to set an expire time. But will it remove the files? I havent upgraded the project or done any testing yet. Will do that and update here later