[dm-devel] Re: [Bugme-new] [Bug 7158] New: Out of memory happen in snapshot

[Alasdair G Kergon]

What is the output of these three commands?

  dmsetup info -c
  dmsetup table
  dmsetup status

The current snapshot implementation does require a lot of kernel memory
to store each snapshot's exception table, which grows as there is new I/O.
Eight snapshots means eight times the memory needed by one snapshot.

Are you using the default chunk size?  If so, try a larger one (lvcreate -c).

Alasdair
-- 
agk at redhat.com