[pgpool-general: 3969] Re: How does one terminate/cancel queries via PGPool safely?
pablo at blueoakdb.com
Sat Aug 15 12:18:37 JST 2015
[ Comments below, in-line ]
On 08/14/2015 10:51 PM, Tatsuo Ishii wrote:
> You are right. Sorry I was wrong.
Bah! Simple error. ;)
> You can safely use pg_cancel_backend() with pgpool-II.
>> Under "Functionality of PostgreSQL" it states:
>> If you use pg_terminate_backend() to stop a backend, this will
>> trigger a failover.
> This is still correct. PostgreSQL returns the same error code when
> PostgreSQL is shutting down.
Hmmm. I have some dumb questions on the above. ;)
1) This one is really really dumb but ... here it goes ... could
PGPool look at the error code and if it thinks PostgreSQL is
shutting down, look at the corresponding command sent and if the
string 'pg_terminate_backend()' is found in the string, not
Perhaps make it controllable via a pgpool.conf parameter?
2) If the above isn't doable, how can we make PGPool disable sending
Thanks a lot!
Pablo Sanchez - Blueoak Database Engineering, Inc
Ph: 819.459.1926 Blog: http://pablo-blog.blueoakdb.com
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