Today I Learned

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About setting pool_size with prod.secret.exs

Setting a pool_size for your database connection in Phoenix used to mean having something like this

config :my_app, MyApp.Repo,
    pool_size: 10

But with prod.secret.exs now using environment variables, the Phoenix default of 10 is only set when you don’t have an environment variable of POOL_SIZE set.

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