[erlang-questions] optimizing mnesia record size
Sun Apr 13 11:20:15 CEST 2008
You might try this one:
Eshell V5.5.4 (abort with ^G)
(It will actually tell you how big the term will be once it has
been "flattened" during copying.)
2008/4/11, Paul Mineiro <>:
> i'm trying to decrease the memory footprint of an mnesia database. i
> turned some strings into binaries and got some space savings. past this,
> i'm sure how to proceed.
> one thing that would help is, is there a way to compute what the record
> size will be (maybe within a constant factor?). i've been playing around
> at the shell calling size/1 on erlang:term_to_binary/1 but i'm not even
> sure this is indicative.
> also, are there some guidelines? i was a bit surprised to discover that
> replacing an atom with binary_to_list/1 composed with list_to_atom/1
> actually made things bigger (by previous paragraph's metric). i was also
> surprised to discover that really short strings are actually better as
> lists rather than binaries.
> any pointers would be greatly appreciated.
> -- p
> In an artificial world, only extremists live naturally.
> -- Paul Graham
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