Hello misc, I have serious problems with my Dell R320 servers (6 servers but i use Intel em i350 cards). Before i was under OpenBSD 5.3 but problem also occurs on 5.2 (today it occurs). Sometimes (too often) the totally freeze. Nothing responds (but ICMP ping works...)
Since 1 month i search to resolve this problem but i don't found where is the problem. I have tried all you mentioned about DDB without success. * Four systems handle 700 clients, and two have squid 3.2.5 compiled with small options (pf-transparent, ssl), and use also named, dhcpd and openOSPFd * The last two system uses only PF+openBGPd+openOSPFd. Before, i think it was related to LACP agregates, but two of the squid systems doesn't use agregates. I also think it's related to CARP, but only 4 four uses CARP... On each system, only 10% of bw is used (10-50Mbps), RAM is correct (each system has too many ram, 16Gbit and use only 8G for squid servers and 200M for other servers). One month ago i have this network problem each 30 minutes on one server. I thinked about too many connections on my proxy. In UNIX logic, a network connection is a file. Then i have increased kern.maxfiles to 16K, openfiles-cur to 8k and openfiles-max to 16k. Since this moment, i haven't have crashed since today. Then i have increased all to 36K. Is this the good way ? Is there anything else to check ?? Must i set openfiles to infinity ?? At this time, here is the current open files on the main squid router on the production: kern.nfiles=4701. Thanks for advance. If you need more details please tell me. -- Best regards, Loïc BLOT, UNIX systems, security and network expert http://www.unix-experience.fr
