[erlang-questions] Index Overhead In Mnesia
Tue Jun 10 18:06:00 CEST 2008
On Tue, Jun 10, 2008 at 4:30 PM, Hynek Vychodil
> I think this is feature of bag and duplicate_bag ets table types and is
> mentioned in manual.
Maybe, but my table does not specify a type, so it be a set by default.
According to the mnesia manual, the three types of table are set,
ordered_set or bag, whereas in ets/dets you can have a duplicate_bag
In the mnesia man page it states:
"Indices do not come free, they occupy space which is proportional to
the size of the table. They also cause insertions into the table to
execute slightly slower."
But I can't see anything specific about using bags and indices.
I googled this post by Ulf a few years ago, which may shed some light
onto the situation:
There seems to be a reference to a (now unmaintained) version of a
mnesia index, which I assume to be the rdbms module in jungerl.
Does anybody know if that addresses the issue, or even exactly what
the underlying problem is?
More information about the erlang-questions