Re: Update command too slow

you mention you use one update statement by record, this may be to
basic but anyway, it just happened to me...

do you use the WHERE clause in your UPDATE statement, and if so is the
column you use to filter indexed?

javier


On Sat, 5 Feb 2005 03:14:52 -0800 (PST), Venkatesh Babu
 wrote:
> Hi,
> 
> There aren't any foreign keys and we are currently
> using Postgres version 7.4...
> 
> --- Venkatesh Babu  wrote:
> 
> > Hi,
> >
> > There aren't any triggers but there are 75262 update
> > statements. The problem is that we have a datatype
> > called as "Collection" and we are fetching the data
> > rows into it, modifying the data and call
> > Collection.save(). This save method generates one
> > update satement per record present in it.
> >
> > Thanks,
> > Venkatesh
> >
> > --- Tom Lane  wrote:
> >
> > > Venkatesh Babu  writes:
> > > > We have a table cm_quotastates which has exactly
> > > > 4624564 rows and 25 columns and 9 indexes... Out
> > > of
> > > > these, our code retrieves 75262 rows and
> > modifies
> > > just
> > > > one column in each row... but updating these to
> > > > database is taking some significant time (around
> > > 20
> > > > minutes)... Tried the following with the update
> > >
> > > Any triggers or foreign keys on that table?  Also,
> > > what PG version is
> > > this?  Are you doing this in a single UPDATE
> > > command, or 75262 separate
> > > commands?
> > >
> > >                     regards, tom lane
> > >
> >
> >
> >
> >
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