[linux-lvm] "cannot allocate memory" when trying to do a snapshot?
mangoo at wpkg.org
Fri Aug 24 14:11:11 UTC 2007
I have a server with ~1.5T PV, on which I have several logial volumes (LVs).
I decided to do a snapshot for five of these LVs, and it succeeded, but
only few times.
dom-dc1 san1 owi-ao 8.00G
dom-oss1 san1 owi-ao 16.00G
dom-sql1 san1 owi-ao 8.00G
dom-sql1-2 san1 owi-ao 50.00G
dom-ts1 san1 owi-ao 16.00G
For each of the LVs, I made 5G snapshots.
I could make three snapshots for all of them, but the fourth snapshot
failed for some LVs (in all, I could only make 18 * 5GB snapshots).
I'm using Debian Etch, with its 2.6.18 64 bit kernel.
The machine has 512 MB RAM, and 3 GB swap:
total used free shared buffers cached
Mem: 512204 492212 19992 0 297784 17864
-/+ buffers/cache: 176564 335640
Swap: 3145720 0 3145720
I've searched the list, and a similar cases appeared on the list in
2002/2003, most without any reply - but it was LVM1 / 2.4.x times.
More information about the linux-lvm