Darafei Praliaskouski wrote: > I am not using route= relations in osm2pgsql. Is there a way to skip their > processing, to get more speed than 4 relations/sec?
This is bothering me for some time now... I don't know the code of osm2pgsql, but what's striking me is the influence of fsync=on/off on the speed of processing relations. I'm importing only a small extract of OSM data, postgres has pretty generous memory settings. Funny thing happens when I turn off fsync - the only significant speed up is in the stage "processing relations", all other stages complete in roughly same times. fsync=on Relation stats: total(70149), max(2061958) in 1524s Osm2pgsql took 3194s overall fsync=off Relation stats: total(70149), max(2061958) in 248s Osm2pgsql took 1864s overall So overall fsync=off is over 40% faster than fsync=on, and almost all is due to the speed up in "processing relations" stage. Best regards, Petr Morávek aka Xificurk
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