On 9 March 2018 at 20:05, Alex Adriaanse <a...@oseberg.io> wrote:
>
> Yes, we have PostgreSQL databases running these VMs that put a heavy I/O load 
> on these machines.

Dump the databases and recreate them with --data-checksums and Btrfs
No_COW attribute.

You can add this to /etc/postgresql-common/createcluster.conf in
Debian/Ubuntu if you use pg_createcluster:
initdb_options = '--data-checksums'
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