Re: Random lockups on an email server - possibly kern/50168

[coypu%SDF.ORG@localhost]

On Mon, Mar 28, 2016 at 12:02:27PM -0400, D'Arcy J.M. Cain wrote:
> On Sun, 27 Mar 2016 17:12:38 -0400
> Dan LaBell <dan4l-nospam%verizon.net@localhost> wrote:
> > > The other thing I see is that swap never gets used.  The system  
> > > appears
> > > to crash when real memory gets used up and swap used is always 0.
> > What happens if you force swap to be used, like mounting a mfs file  
> > system
> > larger than free memory, and filling it?
> 
> I was afraid to try on the production server but I did play with a
> spare.  In fact, the spare was the previous email server.  I thought
> that it might be hardware problems so I swapped out the machine.
> 
> I ran a program that used up more memory than physical memory.  It went
> to swap just fine.
> 
> So swap works but available real memory in dropping with no indication
> of what is using it.  My test program now shows this:
> 
> PS:        2209720
> PROC:     18198136
> 
> As far as I can tell I am seeing a total of 2GB of memory used by all
> processes and resident in memory but the system (top and /proc/meminfo)
> are telling me that 17GB of memory is in use.  What's using the other
> 15GB?
> 
> -- 
> D'Arcy J.M. Cain <darcy%NetBSD.org@localhost>
> http://www.NetBSD.org/ IM:darcy%Vex.Net@localhost

Is someone using hw.physmem instead of hw.physmem64? it is a signed
32bit integer.

Didn't read the conversation, had a similar issue in the past.