Well, now that I have the plan for my slow-running query, what do I do? Where should I focus my attention?
Briefly looking over the plan and seeing the estimated v/s actual row mismatch,I can suggest you following.
1. Vacuum(full) the database. Probably you have already done it. 2. Raise statistics_target to 500 or more and reanalyze the table(s) in question. 3. Set enable_hash_join to false, before running the query and see if it helps.
HTH
Shridhar
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
