A vacuum analyze that used to take about 3 minutes on a table of about
4 million rows is now taking up to 25 minutes. I changed the
statistics on two index columns to 100 recently, to improve planner
estimates. Could this have something to do with the lack of speed?
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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
