* Per Engelbrecht <[EMAIL PROTECTED]> [2006-08-31 11:55]: > Hi all, > > - OpenBSD 4.0 (build on snap from aug. 28 2006 23:10) > - i386 > - 'netstat -m', 'top' and 'dmesg' below. > > I've just rebuild one of my BGP routers and I'm having a real bad > memory/performance issue with this box. > (yes, Im running -current in production due to a Intel Pro/1000GT Quard > card I've had to put in the box; only supported in -current).
despite all the yammering by some pplz that is not a problem at all. > The box seems to choke on <whatever> once and awhile and the problem > seems to be memory related. > If I e.g. ping one of my peers, I see this: > ... > ping: Could only allocate a receive buffer of 8191 bytes (default 65535) > ... so you are running out of mbufs. > Do not like the sound of that, so I did a netstat -m: > 4517 mbufs in use: > 4500 mbufs allocated to data > 12 mbufs allocated to packet headers > 5 mbufs allocated to socket names and addresses > 4495/5886/6144 mbuf clusters in use (current/peak/max) so, the reason is mbuf cluster use. two possibilities: 1) your mbuf cluster is high, but stable 2) it is constantly rising hope for 1). you have quite a few network interfaces in there. if >=1 is connected to a slowish link and you have to buffer a lot, you could just use up that many mbuf clusters. try to raise kern.maxclusters. monitor your mbuf cluster usage using netstat -m. if it is 2) there is a leak somewhere, and these are incredibly hard to track down. -- BS Web Services, http://www.bsws.de/, [EMAIL PROTECTED], [EMAIL PROTECTED] OpenBSD-based Webhosting, Mail Services, Managed Servers, ... Unix is very simple, but it takes a genius to understand the simplicity. (Dennis Ritchie)
