Re: Network permormance under windows - Mailing list pgsql-performance

Dear Merlin,

For instance, we have this table (with 22900 tuples):

CREATE TABLE tbl_empresa
(
id_empresa int4 NOT NULL DEFAULT nextval(('seq_empresa'::text)::regclass),
ref_poblacio int4 NOT NULL,
nom varchar(50) NOT NULL,
nif varchar(12),
carrer varchar(50),
telefon varchar(13),
fax varchar(13),
email varchar(50),
lab_materials int2 DEFAULT 0,
web varchar(50),
ref_empresa int4,
ref_classificacio_empresa int4,
ref_sector_empresa int4,
control int2,
origen_volcat int2,
data_modificacio date,
plantilla int4,
tamany int2,
autoritzacio_email int2,
ref_estat_empresa int2,
CONSTRAINT tbl_clients_pkey PRIMARY KEY (id_empresa),
CONSTRAINT fk_tbl_empresa_ref_classificacio_emp FOREIGN KEY
(ref_classificacio_empresa)
REFERENCES tbl_classificacio_empresa (id_classificacio_empresa) MATCH
SIMPLE
ON UPDATE RESTRICT ON DELETE RESTRICT,
CONSTRAINT fk_tbl_empresa_ref_empresa FOREIGN KEY (ref_empresa)
REFERENCES tbl_empresa (id_empresa) MATCH SIMPLE
ON UPDATE RESTRICT ON DELETE RESTRICT,
CONSTRAINT fk_tbl_empresa_ref_estat_emp FOREIGN KEY (ref_estat_empresa)
REFERENCES tbl_estat_empresa (id_estat_empresa) MATCH SIMPLE
ON UPDATE RESTRICT ON DELETE RESTRICT,
CONSTRAINT fk_tbl_empresa_ref_poblacio FOREIGN KEY (ref_poblacio)
REFERENCES tbl_poblacions (id_poblacio) MATCH SIMPLE
ON UPDATE RESTRICT ON DELETE RESTRICT,
CONSTRAINT fk_tbl_empresa_ref_sector_emp FOREIGN KEY (ref_sector_empresa)
REFERENCES tbl_sector_empresa (id_sector_empresa) MATCH SIMPLE
ON UPDATE RESTRICT ON DELETE RESTRICT
)
WITH OIDS;

When we select all data in local machine, we obtain results in 2-3
seconds aprox. In remote connections:

Postgresql 7.1 usign pgAdminII:
Network traffic generated with remote applications is about 77-80% in a
10Mb connection.
6 seconds aprox.

Postgresql 8.1 usign pgAdminIII:
Network traffic generated with remote applications is about 2-4% in a
10Mb connection.
12 seconds or more...

I feel that is a problem with TCP_NODELAY of socket options... but I
don't know.

Josep Maria


En/na Merlin Moncure ha escrit:

>>We used Postgresql 7.1 under Linux and recently we have changed it to
>>Postgresql 8.1 under Windows XP. Our application uses ODBC and when we
>>try to get some information from the server throw a TCP connection,
>>
>>
>it's
>
>
>>very slow. We have also tried it using psql and pgAdmin III, and we
>>
>>
>get
>
>
>>the same results. If we try it locally, it runs much faster.
>>
>>We have been searching the mailing lists, we have found many people
>>
>>
>with
>
>
>>the same problem, but we haven't found any final solution.
>>
>>How can we solve this? Any help will be appreciated.
>>
>>Thanks in advance.
>>
>>
>>
>by any chance are you working with large tuples/columns (long text,
>bytea, etc)?
>
>Also please define slow.
>
>Merlin
>
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>
>


--

Josep Maria Pinyol i Fontseca
Responsable àrea de programació

ENDEPRO - Enginyeria de programari
Passeig Anselm Clavé, 19 Bx. 08263 Callús (Barcelona)
Tel. +34 936930018 - Mob. +34 600310755 - Fax. +34 938361994
jmpinyol@endepro.com - http://www.endepro.com


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