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help / color / mirror / Atom feedFrom: Tom Lane <tgl@sss.pgh.pa.us>
To: p.sun.fun@gmail.com
Cc: pgsql-sql@lists.postgresql.org
Subject: Re: libpq CREATE DATABASE operation from multiple treads
Date: Thu, 08 Oct 2020 15:57:03 -0400
Message-ID: <2623291.1602187023@sss.pgh.pa.us> (raw)
In-Reply-To: <390804abe88e4e9da9049f6e05c841783acaca47.camel@gmail.com>
References: <390804abe88e4e9da9049f6e05c841783acaca47.camel@gmail.com>
p.sun.fun@gmail.com writes:
> I run this function using only one thread and everything works great.
> If I use two threads, the PQresultStatus(res) != PGRES_COMMAND_OK.
Are you trying to use the same PGconn from multiple threads? That
will not work --- at least not without interlocks that libpq on
its own does not provide.
> Can the server handle CREATE DATABASE requests in parallel?
Sure. But they have to be issued over different connections.
Any given connection can only do one thing at a time.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, p.sun.fun@gmail.com, pgsql-sql@lists.postgresql.org
Subject: Re: libpq CREATE DATABASE operation from multiple treads
In-Reply-To: <2623291.1602187023@sss.pgh.pa.us>
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