Hi,
On 2007-05-10 8:40:36 Claudio Jeker wrote:
> With many shortliving connections you have a lot of sockets in TIME_WAIT.
> Because you are testing from one host only you start to hit these entries
> more and more often this often results in a retry from the client.
I'm curious what you meant by:
"Because you are testing from one host
only you start to hit these entries more ..."
Entries in what?
Why does it matter that the http requests come from the same host?
I'm pushing the stock Apache and 4.2 Generic with http_load and can
make the system unresponsive with a rate of 100 new connections/second
(for 20 seconds). For a short period of time (20s?), my ssh console
is non-responsive. Sometimes SSH even times out. If it comes back,
I can see lots of tcp sockets (1,500+) bound to www in TIME_WAIT.
I'm going to move to lighttpd, but it will have the same issue when
serving lots and lots of small responses.
Do I need to bump somaxmax?
Or are there other avenues I should pursue first?
Or is the test bogus because all connections come from the same IP?
(Host and client are different boxes, connected via the internet.)
Thanks,
m
------------ START DMESG ------------
OpenBSD 4.2 (GENERIC) #375: Tue Aug 28 10:38:44 MDT 2007
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Celeron(R) CPU 2.66GHz ("GenuineIntel" 686-class) 2.67 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,CNXT-ID
real mem = 1064333312 (1015MB)
avail mem = 1021501440 (974MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 10/05/04, BIOS32 rev. 0 @
0xfd71c, SMBIOS rev. 2.31 @ 0xefa20 (47 entries)
bios0: vendor IBM version "2CKT19AUS" date 10/05/2004
bios0: IBM 8085D5U
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
apm0: flags 30102 dobusy 0 doidle 1
pcibios0 at bios0: rev 2.1 @ 0xfd6b0/0x950
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdf00/224 (12 entries)
pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82371FB ISA" rev 0x00)
pcibios0: PCI bus #3 is the last bus
bios0: ROM list: 0xc0000/0xa000! 0xca000/0x1000 0xcb000/0x1000 0xe0000/0x10000!
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel 82865G/PE/P CPU-I/0-1" rev 0x02
vga1 at pci0 dev 2 function 0 "Intel 82865G Video" rev 0x02: aperture
at 0xf0000000, size 0x8000000
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
uhci0 at pci0 dev 29 function 0 "Intel 82801EB/ER USB" rev 0x02: irq 11
uhci1 at pci0 dev 29 function 1 "Intel 82801EB/ER USB" rev 0x02: irq 10
uhci2 at pci0 dev 29 function 2 "Intel 82801EB/ER USB" rev 0x02: irq 5
uhci3 at pci0 dev 29 function 3 "Intel 82801EB/ER USB" rev 0x02: irq 11
ehci0 at pci0 dev 29 function 7 "Intel 82801EB/ER USB2" rev 0x02: irq 3
usb0 at ehci0: USB revision 2.0
uhub0 at usb0: Intel EHCI root hub, rev 2.00/1.00, addr 1
ppb0 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0xc2
pci1 at ppb0 bus 3
vendor "Conexant", unknown product 0x2702 (class communications
subclass miscellaneous, rev 0x01) at pci1 dev 0 function 0 not
configured
acx0 at pci1 dev 1 function 0 "TI ACX111" rev 0x00: irq 11
acx0: ACX111, radio Radia (0x16), EEPROM ver 5, address 00:0f:b5:4c:91:d7
"AT&T/Lucent FW322 1394" rev 0x61 at pci1 dev 2 function 0 not configured
fxp0 at pci1 dev 8 function 0 "Intel PRO/100 VE" rev 0x02, i82562: irq
9, address 00:0d:60:e1:10:85
inphy0 at fxp0 phy 1: i82562ET 10/100 PHY, rev. 0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801EB/ER LPC" rev 0x02:
24-bit timer at 3579545Hz
pciide0 at pci0 dev 31 function 1 "Intel 82801EB/ER IDE" rev 0x02:
DMA, channel 0 configured to compatibility, channel 1 configured to
compatibility
wd0 at pciide0 channel 0 drive 0: <ST3200822A>
wd0: 16-sector PIO, LBA48, 190782MB, 390721968 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <HL-DT-ST, DVDRAM GSA-4082B, A202> SCSI0
5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 4
ichiic0 at pci0 dev 31 function 3 "Intel 82801EB/ER SMBus" rev 0x02: irq 9
iic0 at ichiic0
adt0 at iic0 addr 0x2e: lm85 rev 0x62
auich0 at pci0 dev 31 function 5 "Intel 82801EB/ER AC97" rev 0x02: irq
9, ICH5 AC97
ac97: codec id 0x41445374 (Analog Devices AD1981B)
ac97: codec features headphone, 20 bit DAC, No 3D Stereo
audio0 at auich0
usb1 at uhci0: USB revision 1.0
uhub1 at usb1: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb4 at uhci3: USB revision 1.0
uhub4 at usb4: Intel UHCI root hub, rev 1.00/1.00, addr 1
isa0 at ichpcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask ff6d netmask ff6d ttymask ffef
pctr: user-level cycle counter enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matches BIOS drive 0x80
root on wd0a swap on wd0b dump on wd0b
umass0 at uhub0 port 2 configuration 1 interface 0
umass0: LaCie LaCie Hard Drive USB, rev 2.00/0.00, addr 2
umass0: using SCSI over Bulk-Only
scsibus1 at umass0: 2 targets
sd0 at scsibus1 targ 1 lun 0: <WDC, WD1600BB-00RDA0, 20.0> SCSI2 0/direct fixed
sd0: 152627MB, 19457 cyl, 255 head, 63 sec, 512 bytes/sec, 312581808 sec total
------------ END DMESG ------------
