- Install dependencies:
mix deps.get - Start a new iex session
iex -S mix - Start the observer to view the memory use:
iex> :observer.start - Generate 100 applications using:
iex> Applications.create(100, 20, 20) - or you can measure the performance using:
iex> :timer.tc(Applications, :create, [100, 100, 100])(100, 100, 100 is the limit) and can last until 10 minutes in be created - Applications will be saved into
storagedirectory - Force a garbage collection with:
iex> :erlang.garbage_collect() - Load the applications in memory with
iex> bb = Applications.load() - Now you can play with the bb map
iex> first_app_id = bb |> Map.keys() |> hd()iex> first_app = Map.get(bb, first_app_id)iex> first_text_id = first_app |> Map.keys() |> hd()iex> Map.get(first_app, first_text_id)
The biggest map has 10_000 keys with text (100 x 100). If we pass the text to a word processor we're talking of 4.000 pages of text without white lines.
The biggest map (an improbable application) has a size of 20Mb in memory and about 5Mb in disk. A normal metadata should be a fraction of this size.
A modest map, about 400 keys with text, has a size of 1Mb in memory and 200Kb in disk.
Load 400 modest applications from disk takes 1.2 seconds (3 milliseconds by application)