Обсуждение: R: Very slow bytea data extraction

Thanks for your reply,


>Is it in executing the query (what does
EXPLAIN ANALYSE show)?

Here is the output of explain analyze SELECT *
FROM "FILE"

"Seq Scan on "FILE"  (cost=0.00..1.36 rows=36 width=235)
(actual time=0.023..0.107 rows=36 loops=1)"


>How are you accessing
the database: odbc,jdbc,other?
>Does it do this with psql too?

The
problem is the same when I access the db with jdbc, pgAdmin and even
psql


Massimo

msmbarabino@virgilio.it wrote:
> Thanks for your reply,
>
>
>> Is it in executing the query (what does
> EXPLAIN ANALYSE show)?
>
> Here is the output of explain analyze SELECT *
> FROM "FILE"
>
> "Seq Scan on "FILE"  (cost=0.00..1.36 rows=36 width=235)
> (actual time=0.023..0.107 rows=36 loops=1)"

If you look at the "actual time" it's completing very quickly indeed. So
- it must be something to do with either:
1. Fetching/formatting the data
2. Transferring the data to the client.

What happens if you only select half the rows? Does the time to run the
select halve?

--
   Richard Huxton
   Archonet Ltd

On 2/23/07, msmbarabino@virgilio.it <msmbarabino@virgilio.it> wrote:
> Thanks for your reply,
>
>
> >Is it in executing the query (what does
> EXPLAIN ANALYSE show)?
>
> Here is the output of explain analyze SELECT *
> FROM "FILE"
>
> "Seq Scan on "FILE"  (cost=0.00..1.36 rows=36 width=235)
> (actual time=0.023..0.107 rows=36 loops=1)"
>
>
> >How are you accessing
> the database: odbc,jdbc,other?
> >Does it do this with psql too?
>
> The
> problem is the same when I access the db with jdbc, pgAdmin and even
> psql


are you getting the data from the local box or from a remote site?
also explain analyze is showing nothing slow but you did not post the
enitre output. also, try the \timing switch in psql.

merlin