Re: Who is LISTENing?

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От Sim Zacks
Тема Re: Who is LISTENing?
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Msg-id 507CF13D.5080600@compulab.co.il
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Ответ на Who is LISTENing?  (rektide <rektide@voodoowarez.com>)
Ответы Re: Who is LISTENing?
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    On 10/15/2012 06:11 PM, rektide wrote:

    <blockquote cite="mid:20121015161138.GA17738@eldergods.com"
      type="cite">
      Hi pgsql-general,

I'm interested in writing a supervisory process that can insure worker processes are
running/spawn new ones if not. These workers will mainly be responsible for LISTENing to
the db, which is emitting triggered_change_notification s.

Is there any means to check a NOTIFY queue to see who or if anyone is LISTEN ing on it?

Links:
http://www.postgresql.org/docs/9.2/interactive/sql-notify.html
http://www.postgresql.org/docs/9.2/interactive/tcn.html

Regards,


    You can look in the pg_listener table. The relname is the
    Listen/notify code that you call and the listenerpid is the OS pid.
    You can see more details of that in the pg_stat_activity

    Sim

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