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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi everyone,<br><br><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>I’ve just started testing pgRouting on a big network (Germany) and want to use the whole Europe map later, but it’s pretty slow.<br>I takes around 2,5 min to calculate one route and it makes no difference if the route distance is 7km or 700km.<br><br>Is there anything I can do to speed it up?<br>I have already indices to ‘source’ and ‘target’ and id is primary key, but I don’t know how to use bounding boxes.<br><br><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Furthermore I’ve noticed: when selecting only a part of the graph (keeping in mind that the area of the dijkstra expansion is loaded) it gets much faster.<br>Is this similar to what the bounding box would do?<br><br>To understand this I have some questions about how pgRouting works:<br>Does pgRouting reloads the road data on every request and does the slow calculation results only from fetching the graph?<br>If so, is it possible to load the graph into the memory and reuse it for further requests?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>As I want to execute a lot of kDijkstras consecutively I guess only bounding boxes won’t make it fast enough.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks in advance!<o:p></o:p></span></p></div></body></html>