system resource limit in kernel 2.6

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* system resource limit in kernel 2.6
@ 2004-01-10  1:57 Peng Yong
  2004-01-10  2:24 ` Andrew Morton
  0 siblings, 1 reply; 6+ messages in thread
From: Peng Yong @ 2004-01-10  1:57 UTC (permalink / raw)
  To: linux-kernel


We upgrade one of our production http server, runing apache 1.3.29, to
kernel 2.6. some time the main process of apache exit and here is the
error log:

[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
[Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534


how can i tuning the kernel and remove the system resource limit?

Regards,

Peng Yong

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: system resource limit in kernel 2.6
  2004-01-10  1:57 system resource limit in kernel 2.6 Peng Yong
@ 2004-01-10  2:24 ` Andrew Morton
  2004-01-10  2:42   ` Peng Yong
  2004-01-20  2:47   ` Peng Yong
  0 siblings, 2 replies; 6+ messages in thread
From: Andrew Morton @ 2004-01-10  2:24 UTC (permalink / raw)
  To: Peng Yong; +Cc: linux-kernel

Peng Yong <ppyy@bentium.com> wrote:
>
> 
> We upgrade one of our production http server, runing apache 1.3.29, to
> kernel 2.6. some time the main process of apache exit and here is the
> error log:
> 
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> 
> 
> how can i tuning the kernel and remove the system resource limit?
> 

Well the question is: why did behaviour change relative to 2.4?  The kernel
is saying that uid 65534 has exceeded its RLIMIT_NPROC threshold.

How may processes is user 65534 actually running, and how much memory does
the machine have?

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: system resource limit in kernel 2.6
  2004-01-10  2:24 ` Andrew Morton
@ 2004-01-10  2:42   ` Peng Yong
  2004-01-10 11:07     ` Wichert Akkerman
  2004-01-20  2:47   ` Peng Yong
  1 sibling, 1 reply; 6+ messages in thread
From: Peng Yong @ 2004-01-10  2:42 UTC (permalink / raw)
  To: linux-kernel

> Peng Yong <ppyy@bentium.com> wrote:
> >
> > 
> > We upgrade one of our production http server, runing apache 1.3.29, to
> > kernel 2.6. some time the main process of apache exit and here is the
> > error log:
> > 
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > 
> > 
> > how can i tuning the kernel and remove the system resource limit?
> > 
> 
> Well the question is: why did behaviour change relative to 2.4?  The kernel
> is saying that uid 65534 has exceeded its RLIMIT_NPROC threshold.
> 
> How may processes is user 65534 actually running, and how much memory does
> the machine have?

httpd.conf:

MinSpareServers 16
MaxSpareServers 32
StartServers 16
MaxClients 512

the server is a Dell 1750 with 2GB RAM and 2 CPU.


uname:
Linux www.xxxx.org 2.6.1 #1 SMP Sat Jan 10 00:46:18 CST 2004 i686
unknown

# cat /proc/sys/kernel/threads-max 
32767

# cat /proc/meminfo 
MemTotal:      2072760 kB
MemFree:       1134272 kB
Buffers:         41928 kB
Cached:         573540 kB
SwapCached:          0 kB
Active:         498772 kB
Inactive:       268924 kB
HighTotal:     1179584 kB
HighFree:       450432 kB
LowTotal:       893176 kB
LowFree:        683840 kB
SwapTotal:     4000136 kB
SwapFree:      4000136 kB
Dirty:              44 kB
Writeback:           0 kB
Mapped:         246344 kB
Slab:           156568 kB
Committed_AS:  1390140 kB
PageTables:       2848 kB
VmallocTotal:   114680 kB
VmallocUsed:      2604 kB
VmallocChunk:   112040 kB

www:/home/apache/logs# cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Xeon(TM) CPU 2.80GHz
stepping        : 9
cpu MHz         : 2787.225
cache size      : 512 KB
physical id     : 0
siblings        : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips        : 5488.64

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Xeon(TM) CPU 2.80GHz
stepping        : 9
cpu MHz         : 2787.225
cache size      : 512 KB
physical id     : 6
siblings        : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips        : 5554.17



^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: system resource limit in kernel 2.6
  2004-01-10  2:42   ` Peng Yong
@ 2004-01-10 11:07     ` Wichert Akkerman
  2004-01-10 13:13       ` Peng Yong
  0 siblings, 1 reply; 6+ messages in thread
From: Wichert Akkerman @ 2004-01-10 11:07 UTC (permalink / raw)
  To: Peng Yong; +Cc: linux-kernel

Previously Peng Yong wrote:
> httpd.conf:

Apache does not commonly run a process as the nobody user (uid 65534) so
it is most likely another process on your server.

Wichert.

-- 
Wichert Akkerman <wichert@wiggy.net>    It is simple to make things.
http://www.wiggy.net/                   It is hard to make things simple.


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: system resource limit in kernel 2.6
  2004-01-10 11:07     ` Wichert Akkerman
@ 2004-01-10 13:13       ` Peng Yong
  0 siblings, 0 replies; 6+ messages in thread
From: Peng Yong @ 2004-01-10 13:13 UTC (permalink / raw)
  To: Peng Yong, linux-kernel

> Previously Peng Yong wrote:
> > httpd.conf:
> 
> Apache does not commonly run a process as the nobody user (uid 65534) so
> it is most likely another process on your server.

we compiled the apache from source instead of using binary package from
debian. the apache process was runned as nobody user.

--
Peng Yong                     Email: ppyy@staff.cn99.com
Bentium Ltd.                  URL: http://www.cn99.com


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: system resource limit in kernel 2.6
  2004-01-10  2:24 ` Andrew Morton
  2004-01-10  2:42   ` Peng Yong
@ 2004-01-20  2:47   ` Peng Yong
  1 sibling, 0 replies; 6+ messages in thread
From: Peng Yong @ 2004-01-20  2:47 UTC (permalink / raw)
  To: linux-kernel

> Peng Yong <ppyy@bentium.com> wrote:
> >
> > 
> > We upgrade one of our production http server, runing apache 1.3.29, to
> > kernel 2.6. some time the main process of apache exit and here is the
> > error log:
> > 
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > [Sat Jan 10 08:48:44 2004] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 65534
> > 
> > 
> > how can i tuning the kernel and remove the system resource limit?
> > 
> 
> Well the question is: why did behaviour change relative to 2.4?  The kernel
> is saying that uid 65534 has exceeded its RLIMIT_NPROC threshold.
> 
> How may processes is user 65534 actually running, and how much memory does
> the machine have?


we also find a report in the apache user list for the same problem:

http://marc.theaimsgroup.com/?l=apache-httpd-users&m=107330742328001&w=2

now we downgrade the kernel to 2.4.22 with security patch,  all works
fine now.


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2004-01-20  2:54 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-01-10  1:57 system resource limit in kernel 2.6 Peng Yong
2004-01-10  2:24 ` Andrew Morton
2004-01-10  2:42   ` Peng Yong
2004-01-10 11:07     ` Wichert Akkerman
2004-01-10 13:13       ` Peng Yong
2004-01-20  2:47   ` Peng Yong

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