After thouroughly reading trough many SQL optimisation sites I still
fail to see what I can to to increase performance. To keep it short,
my query joins 16 tables. When using explain, all the joins use
foreign/primary keys so they are indexed. I double checked that since
all the columns in the WHERE-clause of the explain have been index
(again, as primary or foreign key).

Why is it that executing the query and fetching 100 records, takes
1600 ms? Truth is that 5,000 records take 2734 ms

I don't understand why 100 recods take so long and 5,000 records are
relative fast...
Help?
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