I just tested the same on a test machine. It only has one processor 1GB memory, and one SATA disk. The same "select count(*)" was 58 seconds. I started the same UPDATE with EXPLAIN ANALYZE. It is running since 1000 seconds. I'm now 100% sure that the problem is with the database, because this machine has nothing but a postgresql server running on it. I'll post the output of explain analyze later.

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