Caching Fails on Restart

[Lazarus404]

We're using mem to cache values that need to expire after a given time. However, on redeploying or restarting our app, the values, which we're persisting to disk, do not expire. Is this a bug or is this something we should be doing in some other way?

Thanks

[falood]

can you show me you code using mem? you should set persistence: true when use Mem and config mnesia dir in the config.exs.

[Lazarus404]

We're using:

defmodule Cache do
  use Mem,
    worker_number:      10,
    default_ttl:        60 * 60 * 24,
    maxmemory_size:     nil,
    maxmemory_strategy: :ttl,
    persistence:        true
end

[falood]

Hi @Lazarus404 I tested it these days, but I can't reproduce it. So I have to ask you more question about this issue.

1. your erlang and elixir version.
2. how you redeploy and restart the app?
3. make sure the default_ttl in options means seconds
4. make sure you won't change node name(you can check it with Node.self()) and the persistence data dir(config it within config.exs like here)

Thank you.