Hi, I'm using Windows 2000 with Service Pack 4. If you think that it is a file descriptor problem, why this problem apear when I install 3 Squid Services but not happen on previous configuration which install one Squid Service only ? I don't understand about select(). The Loop related error has been solved by not using ICP between Main to both Parent and Parent to Parent sibling relation ship. But the performance with 3 Squid Services still bad. Best regards, -----Original Message----- From: Guido Serassio [mailto:guido.serassio@xxxxxxxxxxxxxxxxx] Sent: Monday, March 03, 2008 12:37 AM To: Lazuardi Nasution; squid-users@xxxxxxxxxxxxxxx Subject: RE: Multi ISP Load Balancing Problem Hi, At 19:51 28/02/2008, Lazuardi Nasution wrote: >We are using Squid 2.6STABLE18 for Windows. The performance is so bad. >Here is some of weird things on log file, I don't have any idea of them. Exactly what Windows version ? I hope that you are using a Windows Server 2003 machine .... >2008/02/28 11:17:38| comm_select: select failure: (10038) WSAENOTSOCK, >Socket operation on nonsocket. >2008/02/28 11:17:38| Select loop Error. Retry 10 >FATAL: Select Loop failed! >Squid Cache (Version 2.6.STABLE18): Terminated abnormally. >CPU Usage: 106.922 seconds = 35.922 user + 71.000 sys Maximum Resident >Size: 41444 KB Page faults with physical i/o: 12269 > >These errors only happen when there is many users are accessing the Squid. >These errors didb't happen when I just using one instance and do load >balancing by separating tcp_outgoing_address on Squid Main based on odd >or even clients source address, I'm not satisfied with this load >balancing method. Don't forget that scalability of Squid on Windows is very limited: - Maximum file descriptors number is hard coded to 2048 in the Microsoft C Runtime library, so you can safely support a top of around 660 CONCURRENT object requests without user authentication. Please note: OBJECT requests, not concurrent USERS. - For portability reasons, the comm loop is based on select(), this is not the better thing for speed. Here you can find some tips on tuning TCP on Windows: http://smallvoid.com/article/winnt-tcpip-max-limit.html Regards Guido - ======================================================== Guido Serassio Acme Consulting S.r.l. - Microsoft Certified Partner Via Lucia Savarino, 1 10098 - Rivoli (TO) - ITALY Tel. : +39.011.9530135 Fax. : +39.011.9781115 Email: guido.serassio@xxxxxxxxxxxxxxxxx WWW: http://www.acmeconsulting.it/
