| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Craig Ringer <craig(at)2ndquadrant(dot)com>, Arseny Sher <a(dot)sher(at)postgrespro(dot)ru>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Two-phase update of restart_lsn in LogicalConfirmReceivedLocation |
| Date: | 2018-03-07 23:32:07 |
| Message-ID: | 15463.1520465527@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Thu, Mar 1, 2018 at 2:03 AM, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
>> So I can't say it's definitely impossible. It seems astonishingly unlikely,
>> but that's not always good enough.
> Race conditions tend to happen a lot more often than one might think.
Just to back that up --- we've seen cases where people could repeatably
hit race-condition windows that are just an instruction or two wide.
The first one I came to in an idle archive search is
https://www.postgresql.org/message-id/15543.1130714273%40sss.pgh.pa.us
I vaguely recall others but don't feel like digging harder right now.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2018-03-07 23:39:32 | Re: Server won't start with fallback setting by initdb. |
| Previous Message | Tom Lane | 2018-03-07 23:17:15 | Re: faster testing with symlink installs |