Re: [INTERFACES] perl interface - Mailing list pgsql-interfaces

From Cyril Ferrand
Subject Re: [INTERFACES] perl interface
Date
Msg-id 199807241427.QAA20633@celia.inria.fr
Whole thread Raw
In response to Re: [INTERFACES] perl interface  (David Hartwig <daveh@insightdist.com>)
List pgsql-interfaces
>
>
> Cyril Ferrand wrote:
>
> > Hello
> >         Is there someone who use perl interface to postgres to put a lot of data into
> > a base.
> > When my table are 40 meg my perl stop...
> >
>
> I'll take a good guess based on what little information you have provided.   I will
> assume the you ran a query which requested a large chunk of that 40 meg table.   The perl
> interface uses libpq.  And libpq slurps the entire query result into memory before
> passing control back to the users code.   This is a weakness of this library.  May I
> suggest that you declare a cursor and request the data in chunks. (fetch 100 rows at a
> time)   If you use a cursor and fetch only one row at a time you may be disappointed in
> the performance.
>
>
> Hello
in fact i dont make query with my perl script ... i make insert and sometimes
(when table are quite big) my perl script stop but no die....
After i do : perl .... to and my script work until it stop again.
I dont understant why ???

Cyril


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