Hi Johan
Normally, you need to run it with the largest timeframe you can get away with - but if that means it's a very small timeframe, like 1 minute, it's what you need to do.
More memory won't make any difference - that's only needed if you run out of memory due to too much data to process in the selected timeframe. You just have to be patient - although 1 min of data is taking 3 mins to process, over a long period of time this will be OK, since you won't have data for every minute of the day. But the attached SQL is not helping: there is an outer join to the item table, twice, and these really need to be inner joins. An outer join is implying that there may be no matching material in the item table for a given bom component, which makes no sense - the material must exist. This incorrect construct will be significantly affecting the query performance when you have large bom_component and item tables.