Re: performance tuning in large function / transaction

Hi all,

  I will try to assign more memory to shared memory,
say 50M ~ 100M . 

  I am runing something like that ..

  cursor loop 1
   cursor loop 2 
    cursor loop 3
     tmp = primary key 
     delete tmp ....
     insert tmp ....
    end loop 3
   end loop 2
  end loop 3

will delete and insert record with same primary key
within a transaction reduce the performance ?

M.T.

--- Stephan Szabo <sszabo@megazone23.bigpanda.com>
wrote:
> On Thu, 13 Dec 2001, MindTerm wrote:
> 
> >   I am writing a function (plpgsql) which equals
> to a
> > single transaction transaction in postgresql ( as
> I
> > known ). So I think that it is not a autocommmit
> mode.
> >
> >   I have add following lines in postgresql.conf.
> >
> > postgresql.conf:
> > ====================
> > shared_buffers = 640
> > wal_buffers = 80
> 
> It depends on how much memory you have, but even 640
> is pretty
> low (I think that works out to 5M).  Probably a few
> thousand
> is better if you've got the ram.
> 


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