On 05/11/2016 11:41 AM, Karsten Hilbert wrote: > On Wed, May 11, 2016 at 11:17:54AM +0200, Niels Kristian Schjødt wrote: > >> We have an ssh connection running from one server to our >> postgresql database on another server. Some times we >> experience that the ssh tunnel does not work anymore and >> needs to be restarted, even though we use the autossh >> package. I would like to write a script that “pings” >> postgresql on the specified port, to check if the connection >> goes through. I have tried with netcat, but it does not >> really check if postgresql is in the other end of the tunnel, >> it only check if there is as service (the tunnel) listing on >> the port on the local machine. Is there another way of >> pinging the port, to see if postgresql is alive at the other >> end? If possible, I would like to NOT actually establishing a >> connection to postgresql like if i used psql -c “select 1;”, >> to avoid connection overhead. > > This > > http://www.postgresql.org/docs/devel/static/libpq-connect.html > > talks about ping functionality. Maybe you can use a tiny > custom piece of code ? That tiny custom piece of code would be this: http://www.postgresql.org/docs/current/static/app-pg-isready.html -- Vik Fearing +33 6 46 75 15 36 http://2ndQuadrant.fr PostgreSQL : Expertise, Formation et Support -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
