Bugs item #1005624, was opened at 2007-05-29 13:21
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 3
Submitted By: Dmitry Dmitriev (dmitry_12)
Assigned to: Nobody (None)
Summary: The limitation for number of connection with ODBC driver
Initial Comment:
We have the big trouble, when our application try to open number of
connection more than 128 with psqlODBC-08_02_0200 driver.
The following file fragment psqlodbc.h from official PostgreSQL web site:
http://wwwmaster.postgresql.org/download/mirrors-ftp?file=%2Fodbc%2Fversions%2Fsrc%2Fpsqlodbc-08.02.0400.tar.gz
...
#define MAX_MESSAGE_LEN 65536 /* This puts a limit on
* query size but I don't */
/* see an easy way round this - DJP 24-1-2001 */
#define MAX_CONNECT_STRING 4096
#define ERROR_MSG_LENGTH 4096
#define FETCH_MAX 100 /* default number of rows to cache
* for declare/fetch */
#define TUPLE_MALLOC_INC 100
#define SOCK_BUFFER_SIZE 4096 /* default socket buffer
* size */
#define MAX_CONNECTIONS 128 /* conns per environment
* (arbitrary) */
#define MAX_FIELDS 512
#define BYTELEN 8
#define VARHDRSZ sizeof(Int4)
...
We need at least 2048 connections for our application.
Can you help us to solve the problem?
Thank you,
Dmitry Dmitriev
Technical Director
Magistral LLC.
email: dydmitriev@yahoo.com
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