From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com> |
Cc: | pgsql-interfaces(at)postgresql(dot)org |
Subject: | Re: PGconn and fork |
Date: | 2013-05-08 14:03:26 |
Message-ID: | 21910.1368021806@sss.pgh.pa.us |
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Lists: | pgsql-interfaces |
Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com> writes:
> I have a program in C, the createas a connection, do stuff, fork, exit
> child and continues life.
> Supose that when I create de PGconn, I have 1 active connection in postgres.
> When I fork, does it count as a second connection? I mean, will postrges
> interpretate 2 active connections or they only share the same connection?
> I know that if the child process execute some query, I can get unexpected
> results, but it doesn't, so I am safe about that.
> I'm only worried that this can increase the number of connections and reach
> the limit of max_connections.
No, the child process will just have another reference to the open
socket that connects to the server. The reason why it's dangerous
to send queries from such a process is exactly that, to the server,
it looks like the same connection as the parent process.
regards, tom lane
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