Cold there be different memory usage under different networking conditions?

[yanshay]

@AnthonyGrondin @ivmarkov wonder if you could help with the question below -

I developed an open source application that's in use by quite a few people. They deploy it by flashing firmware (not building), everyone on the same device, so it's practically exactly the same on all devices.

as part of the application run, it goes out to an external URL (on github) and fetch a small file. All go to the exact same URL and get the same file.

On one device for one person (at least only one I know of) the request fails on esp-mbedtls error 0x7f00 which is a failure to allocate memory. Based on what the user who use that application it happens when the device is at exactly the same state as other devices (so same configuration, after only flashing and setting wifi information).

The question is - could there be different memory usage under certain network condition that would cause the connection take more memory than in other scenarios?

Specifically I'm using edge-http and it is at the initiate_request stage.

[AnthonyGrondin]

edge-http is no_alloc, so the difference would be somewhere in esp-wifi or esp-mbedtls.

It is possible that a peer sends larger / more certificates during a request, as its chain, and therefore make esp-mbedtls allocate more memory. Another possibility is network conditions like busy networks, who might fill up the heap. Have you tried increasing further the heap size?

You can also use esp_alloc::HEAP.stats() to get a detail of heap usage.

[yanshay]

Eventually I moved more data to PSRAM to free DRAM heap for this. Just wondered how could this work in one place and not another when it’s the exact same code and exact same URL.