Date: Wed, 6 Aug 1997 08:52:13 -0500 (CDT) From: "M. L. Dodson" <bdodson@beowulf.utmb.edu> To: rwm@MPGN.COM, dg@root.com Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Spontanious Reboots with 2.2.2 Message-ID: <199708061352.IAA09932@beowulf.utmb.edu>
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I am also planning to run a large application (estimated 1GB swap) on a new 128MB PPro. Would it be possible for one of the kernel/VM/core people to put down a list of the "gotchas" those of us planning this type of application mix might run into? TIA, Bud Dodson > > >I recently installed 2.2.2 on a couple of machines that run a very large > >application. The machine is a Pentium Pro 200 with 256M of memory, an > >Adaptec 29xx SCSI host adapter (2949???) and a 2GB hard drive. I have 512M > >of swap configured. The application eats a lot of file descriptors, but > >less than the 2048 we have it configured for. It also uses a large amount > >of SYSV Shared Memory and SYSV semaphores. > > > >It tends to spontanious reboot after a couple of hours of operation. There > >is no message in the log files and no indication as to why. > > > >Any easy guesses at what could be the problem? The app ran fine under 2.2.1. > > There's a slight chance that you're running out of a resource called "PV > entries". We changed the preallocation formula between the 2.2.1 and 2.2.2 > releases. Try adding this: > > options "PMAP_SHPGPERPROC=400" > > ...to your kernel config file and see if this helps. The larger number of > PV entries coupled with your large amount of physical memory might result > in other problems, however (like the system panicing at boot time due to > running out of kernel VM space). > > -DG > > David Greenman > Core-team/Principal Architect, The FreeBSD Project > -- M. L. Dodson bdodson@scms.utmb.edu 409-772-2178 FAX: 409-772-1790
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