I have a query that takes about 7000 ms in average to complete the first
time it runs. Subsequent runs complete in only 50 ms. That is more than
a factor 100 faster! How can I make the query perform good in the first
run too?
Query and output from both first and second run of Explain Analyze is
pasted here:
http://rafb.net/p/yrKyoA17.html
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
