limits puzzle - different limits on similar machines

From: Danny Howard (dannyman_at_toldme.com)
Date: 08/24/05

  • Next message: Chad Leigh -- Shire.Net LLC: "Re: limits puzzle - different limits on similar machines" 
    Date: Tue, 23 Aug 2005 16:56:42 -0700
To: freebsd-questions@freebsd.org

    Hello,

    We have a process that runs fine on one machine but then dies on
    another, spitting an out-of-memory error.

    Interestingly, the limits for the user are higher on the working machine
    and lower on the other.

    So, I try to puzzle out why, reading all about login.conf, but
    login.conf is the same on every machine I visit, and it sets
    datasize=unlimited ...

    1-16:35 djh@mito ~> uname -a && grep datasize /etc/login.conf && limits
    FreeBSD mito.sr._________.com 5.4-STABLE FreeBSD 5.4-STABLE #3: Fri Jul 29 16:05:16 PDT 2005 root@mito.sr._________.com:/usr/obj/usr/src/sys/MITO i386
            :datasize=unlimited:\
    # :datasize-cur=22M:\
    # :datasize=8M:\
    # :datasize=12M:\
    # :datasize=infinity:\
    # :datasize=infinity:\
    # :datasize-cur@:\
    # :datasize-cur=64M:\
    # :datasize=2M:\
    Resource limits (current):
      cputime infinity secs
      filesize infinity kb
      datasize 524288 kb
      stacksize 65536 kb
      coredumpsize infinity kb
      memoryuse infinity kb
      memorylocked infinity kb
      maxprocesses 3632
      openfiles 7264
      sbsize infinity bytes
      vmemoryuse infinity kb

    Okay, but on a different machine, the machine that runs the tricky process:

    1-16:36 djh@bali ~> uname -a && grep datasize /etc/login.conf && limits
    FreeBSD bali.web.sr._________.com 4.8-STABLE FreeBSD 4.8-STABLE #1: Mon Apr 21 1
    3:36:32 PDT 2003 josh@bali.web.sr._________.com:/local0/world/obj/local0/wor
    ld/src/sys/BALI i386
            :datasize=unlimited:\
    # :datasize-cur=22M:\
    # :datasize=8M:\
    # :datasize=12M:\
    # :datasize=infinity:\
    # :datasize=infinity:\
    # :datasize-cur@:\
    # :datasize-cur=64M:\
    # :datasize=2M:\
    Resource limits (current):
      cputime infinity secs
      filesize infinity kb
      datasize 1048576 kb
      stacksize 1048576 kb
      coredumpsize infinity kb
      memoryuse infinity kb
      memorylocked infinity kb
      maxprocesses 5547
      openfiles 11095
      sbsize infinity bytes
      vmemoryuse infinity kb

    Others?

    0-19:37 djh@web3 ~> uname -a && grep datasize /etc/login.conf && limits
    FreeBSD web3.web._________.com 4.10-RELEASE-p2 FreeBSD 4.10-RELEASE-p2 #1: Thu O
    ct 21 18:39:52 EDT 2004 root@web3.web._________.com:/local0/world/obj/local0
    /world/src/sys/WEB3 i386
            :datasize=unlimited:\
    # :datasize-cur=22M:\
    # :datasize=8M:\
    # :datasize=12M:\
    # :datasize=infinity:\
    # :datasize=infinity:\
    # :datasize-cur@:\
    # :datasize-cur=64M:\
    # :datasize=2M:\
    Resource limits (current):
      cputime infinity secs
      filesize infinity kb
      datasize 524288 kb
      stacksize 65536 kb
      coredumpsize infinity kb
      memoryuse infinity kb
      memorylocked infinity kb
      maxprocesses 5547
      openfiles 11095
      sbsize infinity bytes
      vmemoryuse infinity kb

    0-16:21 djh@rahu ~> uname -a && grep datasize /etc/login.conf && limits
    FreeBSD rahu.web.sr._________.com 4.9-STABLE FreeBSD 4.9-STABLE #1: Mon Mar 22 1
    3:38:20 PST 2004 root@rahu.web.sr._________.com:/local0/world/obj/local0/wor
    ld/src/sys/RAHU i386
            :datasize=unlimited:\
    # :datasize-cur=22M:\
    # :datasize=8M:\
    # :datasize=12M:\
    # :datasize=infinity:\
    # :datasize=infinity:\
    # :datasize-cur@:\
    # :datasize-cur=64M:\
    # :datasize=2M:\
    Resource limits (current):
      cputime infinity secs
      filesize infinity kb
      datasize 524288 kb
      stacksize 65536 kb
      coredumpsize infinity kb
      memoryuse infinity kb
      memorylocked infinity kb
      maxprocesses 5547
      openfiles 11095
      sbsize infinity bytes
      vmemoryuse infinity kb

    I originally suspected that the login class was being set differently on
    different systems based on whether the system was a NIS client or if the
    user was in master.passwd ... in neither case have I bothered setting a
    login class ... but in the above output, rahu and bali are NIS clients,
    web3 and mito are not ...and mito has differing maxprocesses and
    openfiles from other 5.x hosts .. why? Could it be the kernel build?

    0-16:46 djh@mito ~> diff /usr/src/sys/i386/conf/GENERIC /usr/src/sys/i386/conf/MITO
    2c2
    < # GENERIC -- Generic kernel configuration file for FreeBSD/i386 

    ---
> # MITO -- Generic kernel configuration file for FreeBSD/i386
19c19
< # $FreeBSD: src/sys/i386/conf/GENERIC,v 1.413.2.13 2005/04/02 16:37:58 scottl Exp $
---
> # $FreeBSD: src/sys/i386/conf/MITO,v 1.413.2.8 2004/10/24 17:42:08 scottl Exp $
25c25
< ident         GENERIC
---
> ident         MITO
28c28
< #hints                "GENERIC.hints"         # Default places to look for devices.
---
> #hints                "MITO.hints"            # Default places to look for devices.
61c61
< device                apic                    # I/O APIC
---
> device                apic            # I/O APIC
78a79,81
> # Enable SCSI access to IDE DVD drive
> # http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/creating-cds.html#ATAPICAM
> device atapicam
112d114
< device                arcmsr          # Areca SATA II RAID
248d249
< # Note that 'bpf' is required for DHCP.
254d254
< #device               ehci            # EHCI PCI->USB interface (USB 2.0)
268d267
< device                cdce            # Generic USB over Ethernet
276a276,284
> 
> # dummynet
> options IPFIREWALL
> options IPFIREWALL_DEFAULT_TO_ACCEPT
> options DUMMYNET
> options HZ=1000
> 
> # CARP
> device                carp
I doubt that could be it ... and yet I have a 4.x machine that gets
limits similar to mito!?
1-16:51 djh@ratchet ~> uname -a && grep datasize /etc/login.conf &&
limits      FreeBSD ratchet._______.com 4.10-RELEASE-p3 FreeBSD
4.10-RELEASE-p3 #1: Thu Nov  4 22:42:42 PST 2004
root@ratchet._______.com:/usr/obj/usr/src/sys/RATCHET  i386
        :datasize=unlimited:\
#       :datasize-cur=22M:\
#       :datasize=8M:\
#       :datasize=12M:\
#       :datasize=infinity:\
#       :datasize=infinity:\
#       :datasize-cur@:\
#       :datasize-cur=64M:\
#       :datasize=2M:\
Resource limits (current):
  cputime          infinity secs
  filesize         infinity kb
  datasize           524288 kb
  stacksize           65536 kb
  coredumpsize     infinity kb
  memoryuse        infinity kb
  memorylocked     infinity kb
  maxprocesses         3675
  openfiles            7351
  sbsize           infinity bytes
  vmemoryuse       infinity kb
... where else are limits set?
To be fair, bali's kernel config contains some exotic bits:
maxusers    0
# bump max datasize
options     MAXDSIZ="(1024*1024*1024)"
options     MAXSSIZ="(1024*1024*1024)"
options     DFLDSIZ="(1024*1024*1024)"
... and to be fair, I tried setting a user to the default login class on
one box just to be sure, but I was still receiving the same limitations,
where the default login class sets everything to unlimited ...
*throws up hands in frustration*
Any advice?  Wisdom?
Thanks in advance!
Sincerely,
-danny
-- 
http://dannyman.toldme.com/
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  • Next message: Chad Leigh -- Shire.Net LLC: "Re: limits puzzle - different limits on similar machines"

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