| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: standby server crashes hard on out-of-disk-space in HEAD |
| Date: | 2017-08-28 12:06:09 |
| Message-ID: | CAB7nPqT4LSS2gYrMf9_8S623hd0ghEbkJvqgrDeS_Rd2h_=VLg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jun 13, 2017 at 4:21 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2017-06-12 15:12:23 -0400, Robert Haas wrote:
>> Commit 4b4b680c3d6d8485155d4d4bf0a92d3a874b7a65 (Make backend local
>> tracking of buffer pins memory efficient., vintage 2014) seems like a
>> likely culprit here, but I haven't tested.
>
> I'm not that sure. As written above, the Assert isn't new, and given
> this hasn't been reported before, I'm a bit doubtful that it's a general
> refcount tracking bug. The FPI code has been whacked around more
> heavily, so it could well be a bug in it somewhere.
Something doing a bisect could just use a VM that puts the standby on
a tiny partition. I remember seeing this assertion failure some time
ago on a test deployment, and that was really surprising. I think that
this may be hiding something, so we should really try to investigate
more what's wrong here.
--
Michael
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