On 1 Jun 2006, at 17:49, Davide Libenzi wrote: > > On Wed, 31 May 2006, David Lord wrote: > > > I'm not sure of exact cause but I'm getting fairly regular coredumps > > from XMail on NetBSD-3.0. Whist the fd-open files issue on my > > FreeBSD setup isn't apparent it is still an annoyance and if > > anything was a little more frequent, 2 - 3 days vs 2 - 3 weeks. > > > > I've been able to produce a coredump by a kernel compile and have > > noticed that attempting to send to multiple domains or make multiple > > pop3 connections. This was apparent to a much lesser extent on > > FreeBSD. NetBSD server has 64 MB ram and vmstat has avm = 35332 fre > > = 7976 whilst FreeBSD one has 128 MB with avm = 47528 and fre = > > 25464. > > > > So my best guess was a problem memory and reducing the values of > > SmtpMinVirtMemSpace and Pop3MinVirtMemSpace from 10000 to 5000 in > > steps of 1000 seems to confirm this. At around 8000 an improvement > > in that starting a kernel compile didn't produce an immediate > > coredump and at 7000 some compiles completed and so far at 5000 I've > > not had a coredump. > > > > So are SmtpMinVirtMemSpace and Pop3MinVirtMemSpace where the problem > > lies and if so what values should I be using or could eliminating > > the problem require adjusting one of the NetBSD memory sysctls? > > Hmmm, does NetBSD have an OOM killer in the kernel? Can you build > XMail in debug mode and send a gdb `bt full`?
Sorry I'll have to put this on hold for a while as configuring replacement server which is a mini-itx with 1 GB ram. I'll get the info (for which I'd need to do some reading up) after new system is online. I have a cron job that cleans up and restarts xmail should it stop but in normal server operation it's only when there are multiple smtp or pop3 connections being made. I did notice a couple of sysctls that might be relevant, eg. sysctl vm.anonmin = 10. This is minimum vm available as % of total so 6400 KB which might explain why I've not had a coredump so far with *MinVirtMemSpace in server.tab set to 4000. I might try another kernel compile with the sysctl = 20% and *MinVirtMemSpace back to 10000 which ensured XMail would coredump on starting the compile. Regards David - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
