Re: Performance

On Fri, 2002-11-08 at 22:47, Andy Pearce wrote:
> Hi,
>
> I have a postgresql 7.2.1 db running on a Pentium Pro server with
> 160mb ram and scsi drive. I tried to perform a copy to load about 7000
> records, using a c program I'd written and it takes about 20 minutes
> to complete. each record has 5 field and the total size of each record
> is about 56 characters.
>
> Does 20 minutes sound about right for such an action?

No, that seems quite low.

A couple of fairly simple things to consider:

- what is the -B parameter the postmaster is running with? Consider
increasing it.

- consider running a single transaction for the insert. If you commit
after inserting each row then you are asking the database to do a lot
more work.

- what indexing is there on the table? What triggers? Constraints?
Sometimes these can impact substantially in data load situations where
all the data is known correct prior to load. Consider
disabling/removing these things during the load and
reenabling/recreating them afterwards.

Hmmm... That's 3 - guess I can't count :-)

Cheers,
Andrew.
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