| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Hot standby, slot ids and stuff |
| Date: | 2009-01-08 20:44:00 |
| Message-ID: | 49666590.80006@enterprisedb.com |
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| Lists: | pgsql-hackers |
Simon Riggs wrote:
> On Thu, 2009-01-08 at 22:31 +0200, Heikki Linnakangas wrote:
>> When a backend dies with FATAL, it writes an abort record before exiting.
>>
>> (I was under the impression it doesn't until few minutes ago myself,
>> when I actually read the shutdown code :-))
>
> Not in all cases; keep reading :-)
Want to give a clue? ShutdownPostgres is registered as an on_shmem_exit
hook in InitPostgres, and ShutdownPostgres calls AbortOutOfAnyTransaction.
PANIC is another story, but in that case the primary will go down, and
will write a new checkpoint soon after it starts up again.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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