I've posted a first patch, see
http://gis.19327.n8.nabble.com/Patch-v1-reduce-peak-memory-usage-for-global-index-tt5894418.html

Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-boun...@lists.mkgmap.org.uk> im Auftrag von Andrzej 
Popowski <po...@poczta.onet.pl>
Gesendet: Mittwoch, 29. März 2017 23:02:03
An: mkgmap-dev@lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] RAM and mdr Europa ?

Hi Thomas,

have you tried bigger values for -Xmx option? Like for example -Xmx16G,
I think java x64 can use swap file for heap.

--
Best regards,
Andrzej
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