Re: [GENERAL] PostgreSQL corruption - Mailing list pgsql-general
OK,
So with some help from the IRC channel (thanks macdice and JanniCash) it's come to light that my RAID1 comprised of 2 * 7200RPM disks is reporting ~500 ops/sec in pg_test_fsync.
This is higher than the ~120 ops/sec which you would expect from 720RPM disks - therefore something is lying.
Breaking up the RAID and re-imaging with JBOD dropped this to 50 ops/sec - another question but still looking like a real result.
So in this case it looks like the RAID controller wasn't disabling caching as advertised.
Cheers,
James Sewell,
PostgreSQL Team Lead / Solutions Architect
Suite 112, Jones Bay Wharf, 26-32 Pirrama Road, Pyrmont NSW 2009
On Wed, Feb 15, 2017 at 10:29 AM, James Sewell <james.sewell@jirotech.com> wrote:
That's the plan, but it's essentially a client managed embedded database so small steps needed. If I can prove it's the hardware first that would be preferable.It looks like diskcheck.pl doesn't work on Windows (no IO::Handle::sync) - does anybody know of an alternative testkit. A C one would be the best I suppose as it could exactly mimic PostgreSQL.Cheers,James Sewell,PostgreSQL Team Lead / Solutions ArchitectSuite 112, Jones Bay Wharf, 26-32 Pirrama Road, Pyrmont NSW 2009On Wed, Feb 15, 2017 at 4:10 AM, Magnus Hagander <magnus@hagander.net> wrote:On Tue, Feb 14, 2017 at 5:21 AM, James Sewell <james.sewell@jirotech.com> wrote:Hello All,I am working with a client who is facing issues with database corruption after a physical hard power off (the machines are at remote sites, this could be a power outage or user error).They have an environment made up of many of the following consumer grade stand alone machines:
- Windows 7 SP1
- PostgreSQL 9.2.4
If you're using 9.2.4, you are missing about 4 years worth of bugfixes. While what you're talking aobut sounds like other issues, you should really upgrade that to something that doesn't have loads of known bugs and then re-run the tests.--
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