tcoopman
Should `Agent` support hibernate
I was reading the docs on Agent and noticed there is no mentions of hibernation at all.
Given that Agents are just wrappers around GenServers I was kinda surprised .
So I read through the code, but hibernate is not used at all.
Wouldn’t it make sense to support hibernate on Agent? I noticed that hibernation reduce memory consumption often a lot.
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jeffheigl
@tcoopman - Agent supports hibernate_after, I just tried and confirmed it works (using :observer I looked that the Processes → Current Function).
When you call Agent.start_link just pass in the hibernate_after option in miliseconds.
Looking at the code, Agent.start_link will pass through the options to GenServer.start_link
https://github.com/elixir-lang/elixir/blob/main/lib/elixir/lib/agent.ex#L276
dimitarvp
You would think so, yep, but I’d say if you have enough Agents in memory that hibernating them would help you then you have a huge design problem. I mean, you would probably need 500K - 1M agents for this to make a tangible difference. And you absolutely should not have so many agents.
derek-zhou
IMHO, Agent is just GenServer with training wheels. I moved to full GenServer for all Agents except the trivial ones. Maybe the core team think adding advanced features to a “training-wheel” API is not worth their time?
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