apache freezes the virtual machine.

["Asrai khn" <asraikhn@xxxxxxxxx>]

Hi we are running our shared web server under vm (UML) distro FC7 its working fine but once in 10-15 days apache shoots  virtual machine load very hight upto 20-30 and all swap been consumed. if some how we get into the vm via ssh stop/start apache normalize the vm which clearly show that is apache that freezing and shooting the load on vm.

Mem: 512M
swap: 1024M

here what i find in logs

Dec 17 12:50:51 xxxx kernel: httpd invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
Dec 17 12:50:51 xxxx kernel: 1330fd68:  [<08053cfc>] dump_stack+0x1c/0x20
Dec 17 12:50:51 xxxx kernel: 1330fd80:  [<0808a4f8>] out_of_memory+0x6b/0xd3
Dec 17 12:50:51 xxxx kernel: 1330fda8:  [<0808b356>] __alloc_pages+0x1ed/0x26c
Dec 17 12:50:51 xxxx kernel: 1330fde8:  [<080974b3>] read_swap_cache_async+0x33/0x80
Dec 17 12:50:51 xxxx kernel: 1330fdfc:  [<080917e8>] swapin_readahead+0x3c/0x5f
Dec 17 12:50:51 xxxx kernel: 1330fe20:  [<08091868>] do_swap_page+0x5d/0x1d4
Dec 17 12:50:51 xxxx kernel: 1330fe4c:  [<08091fbb>] __handle_mm_fault+0x10a/0x17e
Dec 17 12:50:51 xxxx kernel: 1330fe80:  [<08054926>] handle_page_fault+0xe2/0x1bc
Dec 17 12:50:51 xxxx kernel: 1330feb4:  [<08054b5e>] segv+0xa2/0x240
Dec 17 12:50:51 xxxx kernel: 1330ff68:  [<08063ae7>] handle_segv+0x32/0x3a
Dec 17 12:50:51 xxxx kernel: 1330ff94:  [<08063f8f>] userspace+0x117/0x166
Dec 17 12:50:51 xxxx kernel: 1330ffdc:  [<08055371>] fork_handler+0x74/0x7c
Dec 17 12:50:51 xxxx kernel: 1330fffc:  [<a55a5a5a>] 0xa55a5a5a
Dec 17 12:50:51 xxxx kernel:
Dec 17 12:50:51 xxxx kernel: Mem-info:
Dec 17 12:50:51 xxxx kernel: Normal per-cpu:
Dec 17 12:51:23 xxxx kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  34   Cold: hi:   62, btch:  15 usd:  60
Dec 17 12:51:28 xxxx kernel: Active:73753 inactive:50187 dirty:0 writeback:4 unstable:0
Dec 17 12:51:29 xxxx kernel:  free:702 slab:2098 mapped:670 pagetables:960 bounce:0
Dec 17 12:51:30 xxxx kernel: Normal free:2808kB min:2884kB low:3604kB high:4324kB active:295012kB inactive:200748kB present:520192kB pages_scanned:829898 a
ll_unreclaimable? yes

Any idea how to make this vm stable?

Askar.