https://internetcomputer.org/docs/building-apps/canister-management/resource-limits claims that Wasm heap memory, per canister 4GiB But isn’t WASM64 specifically to overcome this limit and create tera-sized canisters? Is this limit value outdated?

I ask about heap memory size, not WASM size. What is the maximum heap memory?

Currently 4 GB, once wasm64 is released then it’s gonna be 6 GB. We switched to stable memory and we use heap only for some computation.

[image] Gabriel: We switched to stable memory and we use heap only for some computation. I don’t understand what these words mean. Does it mean that what was stable memory will become heap memory and therefore heap will be growable up to ~1TiB?

What he means is that he switched his project from heap to stable as it’s just a descision you have as a developer; heap has the benefit of being faster and cheaper compared to stable, but has limitations related to storage, plus requires custom logic for persisting between upgrades via pre-/post …

"Wasm heap memory, per canister 4GiB" Or has it been increased?

Developers

C-B-Elite August 30, 2025, 7:56am 2

Currently, the available WASM size is 6 GB, but I think this applies when compiling to wasm64 rather than wasm32. I haven’t used this feature yet.

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"Wasm heap memory, per canister 4GiB" Or has it been increased?

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