Re: Problems with PostGreSQL and Windows 2003 - Mailing list pgsql-performance

Hello,

   I forgot to say that I changed  work_mem  to 16 MB but I didn't have sucess.
I received the same
error message.


Thanks,
Cláudia Amorim.



> Hi,
>
> When I set shared buffers higher than 1GB, PostGreSQL doens't start.
>
> When my application crashes I receive a message "Out of memory" or
> "invalid  sql statement". But the sql statement is ok - if I execute it
> in a table with less registers, it works and it is very simple. When I monitor
> the processes
> I can see that PostGreSQL allocs only 700 MB of memory, and my application 2GB.
> Total: 3GB.
> My program was made in Delphi 2006, and I use ADO via ODBC to connect to
> PostGreSQL.
>
> The structure of my table:
>
> CREATE TABLE "public"."fato_financeiro" (
>   "CODCLI" VARCHAR(6),
>   "PREST" VARCHAR(4) NOT NULL,
>   "NUMTRANSVENDA" VARCHAR(10) NOT NULL,
>   "RECNUM" VARCHAR(8) NOT NULL,
>   "CODFORNEC" VARCHAR(8),
>   "TIPO" VARCHAR(2),
>   "NUMDOC" VARCHAR(10),
>   "PREST_1" VARCHAR(4),
>   "VALOR" DOUBLE PRECISION,
>   "DTEMISSAO" TIMESTAMP WITH TIME ZONE,
>   "DTVENC" TIMESTAMP WITH TIME ZONE,
>   "DTPAG" TIMESTAMP WITH TIME ZONE,
>   "VPAGO" DOUBLE PRECISION,
>   "PAGO_PAG" VARCHAR(9),
>   "ATRASADO" VARCHAR(3),
>   CONSTRAINT "fato_financeiro_idx" PRIMARY KEY("PREST", "NUMTRANSVENDA",
> "RECNUM")
> ) WITHOUT OIDS;
>
>
> SQL statement:
>
> select
> fato_financeiro."TIPO",
> fato_financeiro."NUMDOC",
> fato_financeiro."PREST",
> fato_financeiro."NUMDOC",
> fato_financeiro."DTVENC",
> fato_financeiro."DTPAG",
> fato_financeiro."PAGO_PAG",
> fato_financeiro."ATRASADO",
> fato_financeiro."CODCLI",
> fato_financeiro."CODFORNEC",
> fato_financeiro."DTEMISSAO"
> from fato_financeiro
>
>
>
> Thanks,
> Cláudia.
>
>
>
>
>> claudia.amorim@pcinformatica.com.br wrote:
>>> I'm having serious peformance problems with PostGreSQL and Windows Server
>>> 2003
>>> Enterprise Edition. The PostgreSQL Server don't starts if I set the shared
>>> buffers high than
>>> 1GB. All my programs can use only 3 GB of RAM and I have 8GB of RAM.
>>> When I try to execute a query in a table about 4 milion registers, my
>>> application crashes with an error memory message.
>>
>> What error message do you get if setting shared_buffers higher than 1GB?
>> Exactly what error message do you get when the application crashes?
>>
>>> work_mem =512MB                # min 64kB
>>
>> That's way too high for most applications. In a complex query, each sort
>> or hash node can will use up work_mem amount of memory. That means that
>> if you have a very complex query with several such nodes, it will run
>> out of memory. Try something like 16MB.
>>
>>
>> --
>>    Heikki Linnakangas
>>    EnterpriseDB   http://www.enterprisedb.com
>>
>> ---------------------------(end of broadcast)---------------------------
>> TIP 6: explain analyze is your friend
>>
>
>
>
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