Hi reading google.. i come to here... maybe i can help more about this issue.
on server pglog: 2009-07-15 09:40:27 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:40:27 BRTLOG: unexpected EOF on client connection 2009-07-15 09:41:35 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:41:35 BRTLOG: unexpected EOF on client connection 2009-07-15 09:44:05 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:44:05 BRTLOG: unexpected EOF on client connection 2009-07-15 09:45:09 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:45:09 BRTLOG: unexpected EOF on client connection 2009-07-15 09:45:14 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:45:14 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:45:14 BRTLOG: unexpected EOF on client connection 2009-07-15 09:45:14 BRTLOG: unexpected EOF on client connection 2009-07-15 09:50:30 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:50:30 BRTLOG: unexpected EOF on client connection 2009-07-15 09:51:34 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:51:34 BRTLOG: unexpected EOF on client connection 2009-07-15 09:51:34 BRTLOG: could not receive data from client: Unknown winsock error 10061 2009-07-15 09:51:34 BRTLOG: unexpected EOF on client connection Enviroment: The server running W2003 R2 with Intel Quad Core Q6600 @ 2,4Ghz - 4Gb RAM PostgreSQL 8.4.0 before was used PG 8.3 and happens too. Notes: * 40 to 60 simultaneus conection to database * use libpq.dll to conect to server. * use Zeos 7 / Delphi 2009 application. this application makes 2 connection to a same database (for transaction isolation) * error dont happen in server and 20 machines winXP * error happen only in 5 machines with winXP * in this 5 machines: Removed Antivirus, Firewall and windows update activated. * changed hub port cables to prevent hardware fails. then i decided format 1 machine, instaled winxp and the problems not happend! very stange... i thinking format these other machines... but i want detect what dll of windows is outdated or with problem... another strange error in same 5 clients, i think that has relation... let´s go.. before i received message in client "could not receive data from server WSAStartup not yet called (0x0000276D10093)" and the server log register "winsock error 10061". this message occours only if a client database connection is stand by for a time (1 minute or more) to resolve this is added a timer to make the stupid query "select now()" every 20 seconds, only to simulate activity on connection, and not happend more... if necessary i can make any test to try resolve this... any idea is welcome. Franklin Haut