| From: | Sim Zacks <sim(at)compulab(dot)co(dot)il> |
|---|---|
| To: | PostgreSQL general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Who is LISTENing? |
| Date: | 2012-10-16 09:35:38 |
| Message-ID: | 507D2A6A.10402@compulab.co.il |
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<div class="moz-cite-prefix">On 10/16/2012 07:49 AM, Raghavendra
wrote:<br>
</div>
<blockquote
cite="mid:CA+h6Ahiy7n-FEydc8M3BLPoCunVRV3cmwHvtxXqougDwM3uwgw(at)mail(dot)gmail(dot)com"
type="cite"><br>
<div class="gmail_quote">On Tue, Oct 16, 2012 at 11:01 AM, Sim
Zacks <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:sim(at)compulab(dot)co(dot)il" target="_blank">sim(at)compulab(dot)co(dot)il</a>></span>
wrote:<br>
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<div>On 10/15/2012 06:11 PM, rektide wrote:<br>
</div>
<blockquote type="cite">
<pre>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:
<a moz-do-not-send="true" href="http://www.postgresql.org/docs/9.2/interactive/sql-notify.html" target="_blank">http://www.postgresql.org/docs/9.2/interactive/sql-notify.html</a>
<a moz-do-not-send="true" href="http://www.postgresql.org/docs/9.2/interactive/tcn.html" target="_blank">http://www.postgresql.org/docs/9.2/interactive/tcn.html</a>
Regards,
</pre>
</blockquote>
</div>
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<span class="HOEnZb"><font color="#888888"><br>
<br>
Sim<br>
</font></span></div>
</blockquote>
</div>
<br>
<div>I guess pg_listener table is deprecated and no longer exist
in PG 9.0 onwards. </div>
<div><br>
</div>
<div>--Raghav</div>
</blockquote>
I guess I'm dating myself (still on 8.2)<br>
This discussion indicates that it is not possible.<br>
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