plpgsql function running long, but resources consumption is very low

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Hi,

I'm having serious performance problems with my two plpgsql functions (lots of calculations inside, including distance (lat,long) using earthdistance etc).

My problem is: both functions are executing for hours (if not days) but resource consumption is low (I/O, CPU, memory), like 2-5% only. I'm a bit confused on what's going on there... locks? poor resources management by Windows? I'm not really sure where the bottleneck might be.

Any hints/recommendations where and how should I look for improvements?

I'm running 8.2 on WinXP.

I'm aware it's kind of hard to say without seeing function's body, but I thought I can give a try anyway.

Regards,
foo

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