diagnosing a reacurring system freeze

Thu Feb 15 23:03:15 UTC 2007

Hard to tell if it is your dc0 ethernet adapter or a swap issue.  I would 
try a different ethernet controller and see what happens as that is a cheap 
experiment.

         -Derek

At 04:30 PM 2/15/2007, Zbigniew Szalbot wrote:
>Hello,
>
>Derek Ragona wrote:
> > First you should provide more information such as the output from your
> > dmesg, whether you have the server running X or just text mode.
>
>In my case I do not run X, the system mostly operates mysql database and
>exim MTA (and this causes a bigger load sometimes up to 3.0 or so).
>
> >
> > Describe your lockup, does the system completely freeze, or is it still
> > ping-able?
>In my case it is always a complete freeze but only for a relatively short
>period of time (20-30 seconds, sometimes longer though - up to 2 minutes).
>
>For example, I noticed on a few occasions that when I used cat |grep on a
>log file and the output displayed on screen was quite extensive (lots of
>data), the system would freeze. But not always.
>
>Here's the dmesg.today output:
>
>Copyright (c) 1992-2007 The FreeBSD Project.
>Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>         The Regents of the University of California. All rights reserved.
>FreeBSD is a registered trademark of The FreeBSD Foundation.
>FreeBSD 6.2-RELEASE #0: Mon Jan 22 12:52:41 CET 2007
>     root at 192.168.11.51:/usr/obj/usr/src/sys/LISTS
>Timecounter "i8254" frequency 1193182 Hz quality 0
>CPU: Intel Pentium III (868.20-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0x686  Stepping = 6
> 
>Features=0x387f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,PN,MMX,FXSR,SSE>
>real memory  = 535691264 (510 MB)
>avail memory = 514801664 (490 MB)
>kbd1 at kbdmux0
>acpi0: <MEIP01 > on motherboard
>acpi0: Power Button (fixed)
>Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
>acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
>cpu0: <ACPI CPU> on acpi0
>acpi_button0: <Power Button> on acpi0
>pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
>pci0: <ACPI PCI bus> on pcib0
>agp0: <Intel 82810E (i810E GMCH) SVGA controller> mem
>0xe8000000-0xebffffff,0xeff80000-0xefffffff irq 10 at device 1.0 on pci0
>pcib1: <ACPI PCI-PCI bridge> at device 30.0 on pci0
>pci1: <ACPI PCI bus> on pcib1
>dc0: <Davicom DM9102A 10/100BaseTX> port 0xbc00-0xbcff mem
>0xefdfff00-0xefdfffff irq 11 at device 0.0 on pci1
>miibus0: <MII bus> on dc0
>ukphy0: <Generic IEEE 802.3u media interface> on miibus0
>ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
>dc0: Ethernet address: 00:80:ad:82:6e:58
>isab0: <PCI-ISA bridge> at device 31.0 on pci0
>isa0: <ISA bus> on isab0
>atapci0: <Intel ICH UDMA66 controller> port
>0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci0
>ata0: <ATA channel 0> on atapci0
>ata1: <ATA channel 1> on atapci0
>pci0: <serial bus, USB> at device 31.2 (no driver attached)
>pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
>pci0: <multimedia, audio> at device 31.5 (no driver attached)
>atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
>atkbd0: <AT Keyboard> irq 1 on atkbdc0
>kbd0 at atkbd0
>atkbd0: [GIANT-LOCKED]
>fdc0: <floppy drive controller> port 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7 irq 6
>drq 2 on acpi0
>fdc0: [FAST]
>fd0: <1440-KB 3.5" drive> on fdc0 drive 0
>sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
>sio0: type 16550A
>ppc0: <ECP parallel printer port> port 0x378-0x37f,0x778-0x77b irq 7 drq 3
>on acpi0
>ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
>ppc0: FIFO with 16/16/9 bytes threshold
>ppbus0: <Parallel port bus> on ppc0
>plip0: <PLIP network interface> on ppbus0
>lpt0: <Printer> on ppbus0
>lpt0: Interrupt-driven port
>ppi0: <Parallel I/O> on ppbus0
>pmtimer0 on isa0
>orm0: <ISA Option ROM> at iomem 0xc0000-0xcbfff on isa0
>sc0: <System console> at flags 0x100 on isa0
>sc0: VGA <16 virtual consoles, flags=0x300>
>sio1: configured irq 3 not in bitmap of probed irqs 0
>sio1: port may not be enabled
>vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
>Timecounter "TSC" frequency 868204315 Hz quality 800
>Timecounters tick every 1.000 msec
>ad0: 76319MB <WDC WD800JB-00JJC0 05.01C05> at ata0-master UDMA66
>acd0: CDROM <LTN485/KQG1> at ata0-slave PIO4
>Trying to mount root from ufs:/dev/ad0s1a
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>swap_pager: out of swap space
>swap_pager_getswapspace(1): failed
>swap_pager_getswapspace(15): failed
>swap_pager_getswapspace(7): failed
>swap_pager: out of swap space
>swap_pager_getswapspace(6): failed
>pid 85217 (mysqld), uid 88, was killed: out of swap space
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>dc0: watchdog timeout
>
>The instance where mysql was killed did not happen today but a few days
>ago, when there was an excessive load on the box. I failed to implement
>some precautions and as a result the load went above 10.
>
>Thanks for any further hints. I get 1, 2 such freezes a day.
>
>--
>Zbigniew Szalbot
>
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