[Users] Committed_AS = 4TB
Vasily Tarasov
vtaras at openvz.org
Tue May 8 04:46:02 EDT 2007
Hello,
For me it seems to be strange too... Can you, please, post the output
of /proc/user_beancounters here in order to see which VE allocates so
much memory.
Thanks,
Vasily.
On Mon, 2007-05-07 at 15:27 +0200, Jan Tomasek wrote:
> Hello,
>
> my system have Committed_AS: 4253406264 kB, it is not causing any
> problems (except of munin which is draving just line on zero). I found
> this explanation:
>
> # Committed_AS: An estimate of how much RAM you would need to make a
> 99.99% guarantee that there never is OOM (out of memory) for this
> workload. Normally the kernel will overcommit memory. That means, say
> you do a 1GB malloc, nothing happens, really. Only when you start USING
> that malloc memory you will get real memory on demand, and just as much
> as you use. So you sort of take a mortgage and hope the bank doesn't go
> bust. Other cases might include when you mmap a file that's shared only
> when you write to it and you get a private copy of that data. While it
> normally is shared between processes. The Committed_AS is a guesstimate
> of how much RAM/swap you would need worst-case.
>
> http://www.redhat.com/advice/tips/meminfo.html
>
> I'm having troubles to identify who allocated that much memory.
>
> > top - 15:16:17 up 29 days, 5:02, 2 users, load average: 7.01, 6.83, 6.66
> > Tasks: 460 total, 7 running, 452 sleeping, 1 stopped, 0 zombie
> > Cpu(s): 0.2%us, 1.4%sy, 76.0%ni, 22.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
> > Mem: 8303004k total, 8146708k used, 156296k free, 334560k buffers
> > Swap: 24579440k total, 196k used, 24579244k free, 6876788k cached
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 16430 semik 10 -10 1215m 1.0g 1.0g S 2 13.1 133:56.51 vmware-vmx
> > 10950 root 18 0 1199m 66m 5784 S 0 0.8 0:39.85 java
> > 16463 semik 7 -10 533m 428m 410m S 1 5.3 58:29.35 vmware-vmx
> > 16446 semik 5 -10 391m 280m 266m S 5 3.5 245:58.27 vmware-vmx
> > 2575 www-data 21 0 225m 2936 1448 S 0 0.0 0:00.00 apache2
> > 2577 www-data 21 0 225m 2928 1452 S 0 0.0 0:00.00 apache2
> > 11128 25 24 0 96916 10m 2068 S 0 0.1 0:02.29 named
>
> rest of process have virt. mem size <<100MB.
>
> My system has 8GB of physical RAM. Runing 2.6.18-028stab023 and VMware
> Server - that might be source but... VMware workstation is not causing
> this (tested on other system). Meminfo:
>
> staj# cat /proc/meminfo
> MemTotal: 8303004 kB
> MemFree: 154140 kB
> Buffers: 334616 kB
> Cached: 6877772 kB
> SwapCached: 0 kB
> Active: 4035760 kB
> Inactive: 3536216 kB
> HighTotal: 7470840 kB
> HighFree: 132144 kB
> LowTotal: 832164 kB
> LowFree: 21996 kB
> SwapTotal: 24579440 kB
> SwapFree: 24579244 kB
> Dirty: 732 kB
> Writeback: 0 kB
> AnonPages: 359868 kB
> Mapped: 1814360 kB
> Slab: 464916 kB
> PageTables: 9756 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> CommitLimit: 28730940 kB
> Committed_AS: 4253406264 kB
> VmallocTotal: 118776 kB
> VmallocUsed: 42692 kB
> VmallocChunk: 75716 kB
>
> and vzmemcheck:
>
> > staj:/etc# vzmemcheck -v
> > Output values in %
> > veid LowMem LowMem RAM MemSwap MemSwap Alloc Alloc Alloc
> > util commit util util commit util commit limit
> > 233003 0.15 1.31 0.03 0.01 0.09 0.01 0.09 0.66
> > 233250 1.26 11.88 0.49 0.12 0.20 0.40 0.20 38.39
> > 233104 0.14 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233103 0.17 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233107 0.17 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233106 0.16 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233105 0.16 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233102 0.18 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233101 0.18 10.67 0.03 0.01 0.18 0.01 0.18 38.37
> > 233009 0.42 9.13 0.11 0.03 0.17 0.05 0.17 38.36
> > 233249 0.92 10.67 0.60 0.15 0.18 1.52 0.18 38.37
> > 222119 0.44 10.67 0.12 0.03 0.18 0.05 0.18 38.37
> > 233008 1.22 9.13 1.01 0.26 0.17 3.85 0.17 38.36
> > 233006 1.11 10.67 1.34 0.34 0.18 0.37 0.18 38.37
> > 222121 0.17 9.13 0.03 0.01 0.17 0.01 0.17 38.36
> > 192002 0.24 4.64 0.04 0.01 0.12 0.01 0.12 38.31
> > -------------------------------------------------------------------------
> > Summary: 7.09 151.91 3.97 1.00 2.73 6.35 2.73 576.18
>
>
> Does anybody know how to explain that 4TB?
>
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