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Re: [linux-lvm] how much memory does LVM need? oom-killer comes



Tomasz Chmielewski schrieb:
Tomasz Chmielewski schrieb:
I just did vgchange -an, and there came the oom-killer. This is all with 2.6.22.5 kernel.

The machine has 256 MB RAM; PV is almost 1.5 TB big:

# pvs
  PV         VG          Fmt  Attr PSize PFree
  /dev/md0   superthecus lvm2 a-   1.46T 120.63G

After I do "vgchange -ay", the memory usage goes from ~17 MB to almost 180 MB - is it normal?

Can the memory usage be so high (~180 MB out of 256 MB) because I have two pretty big snapshots? Normally, this machine uses about 17 MB.


# lvs
LV VG Attr LSize Origin Snap% Move Log Copy%
  backup              superthecus owi-ao   1.20T
  backup-snap         superthecus swi-a- 100.00G backup  30.15
  backup-snap-resized superthecus swi-a-  30.00G backup  69.00
  backup1             superthecus -wi-a-   3.00G
  backup1-sync-test   superthecus -wi-a-   3.00G
  src                 superthecus -wi-a-   2.00G
  swap                superthecus -wi-ao   3.00G


Unfortunately, I can't remove these snapshots, as oom-killer comes :(
Is there any solution to that, other than adding memory (which can be hard to do remotely)?

Ouch - now it went so far that the machine only loops from a kernel panic to a kernel panic - that's really bad:

(...)
Out of memory: kill process 2220 (getty) score 24 or a child
Killed process 2220 (getty)
Kernel panic - not syncing: Out of memory and no killable processes...

Rebooting in 20 seconds..


--
Tomasz Chmielewski
http://wpkg.org


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