On 2020-11-06 23:54, Ranier Vilela wrote:
Hi Marina,
Hello!
Nice catch.
Thank you!
rc/bin/pgbench/pgbench.c, the function add_socket_to_set:
if (fd < 0 || fd >= FD_SETSIZE)
{
/*
* Doing a hard exit here is a bit grotty, but it doesn't seem worth
* complicating the API to make it less grotty.
*/
pg_log_fatal("too many client connections for select()");
exit(1);
}
It seems to me that the limit is hardcode in,
src/backend/port/win32/socket.c
FD_SETSIZE * 2
that would be 2048?
1) If you mean the function pgwin32_select in the file
src/backend/port/win32/socket.c, IIUC it is only used in the backend,
see src/include/port/win32_port.h:
#ifndef FRONTEND
<...>
#define select(n, r, w, e, timeout) pgwin32_select(n, r, w, e, timeout)
<...>
#endif /* FRONTEND */
2) It looks like FD_SETSIZE does not set a limit on the socket value on
Windows, see
https://docs.microsoft.com/en-us/windows/win32/winsock/maximum-number-of-sockets-supported-2
:
The maximum number of sockets that a Windows Sockets application can use
is not affected by the manifest constant FD_SETSIZE. This value defined
in the Winsock2.h header file is used in constructing the FD_SET
structures used with select function.
--
Marina Polyakova
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
