Обсуждение: [GENERAL] I can't cancel/terminate query.

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[GENERAL] I can't cancel/terminate query.

От
Edmundo Robles
Дата:
Hi!  i have  many  too long time queries,  the oldest  is  almost 16 days, so i  tried to cancel and terminate with pg_cancel_backend and pg_terminate_backend  but queries is still running.

STIME     ELAPSED ELAPSED %CPU   PID COMMAND
jun27 15-23:05:46 1379146  0.3 29660 postgres: argos_admin bdkairos 127.0.0.1(55605) SELECT                             
jun27 15-23:05:46 1379146  0.3 29659 postgres: argos_admin bdkairos 127.0.0.1(55604) SELECT                             
jun27 15-23:05:46 1379146  0.3 29658 postgres: argos_admin bdkairos 127.0.0.1(55603) SELECT                             
jun27 15-23:05:16 1379116  0.3 29909 postgres: argos_admin bdkairos 127.0.0.1(55767) SELECT                             
jun27 15-23:04:51 1379091  0.3 30097 postgres: argos_admin bdkairos 127.0.0.1(55909) SELECT                             
jun27 15-23:03:49 1379029  0.3 30661 postgres: argos_admin bdkairos 127.0.0.1(56303) SELECT        
...
What should  i do to safely close that  queries, before to use kill command in linux? 

I have Postgres 9.4  running on debian jessie.
 


--

Re: [GENERAL] I can't cancel/terminate query.

От
Melvin Davidson
Дата:


On Thu, Jul 13, 2017 at 11:57 AM, Edmundo Robles <edmundo@sw-argos.com> wrote:
Hi!  i have  many  too long time queries,  the oldest  is  almost 16 days, so i  tried to cancel and terminate with pg_cancel_backend and pg_terminate_backend  but queries is still running.

STIME     ELAPSED ELAPSED %CPU   PID COMMAND
jun27 15-23:05:46 1379146  0.3 29660 postgres: argos_admin bdkairos 127.0.0.1(55605) SELECT                             
jun27 15-23:05:46 1379146  0.3 29659 postgres: argos_admin bdkairos 127.0.0.1(55604) SELECT                             
jun27 15-23:05:46 1379146  0.3 29658 postgres: argos_admin bdkairos 127.0.0.1(55603) SELECT                             
jun27 15-23:05:16 1379116  0.3 29909 postgres: argos_admin bdkairos 127.0.0.1(55767) SELECT                             
jun27 15-23:04:51 1379091  0.3 30097 postgres: argos_admin bdkairos 127.0.0.1(55909) SELECT                             
jun27 15-23:03:49 1379029  0.3 30661 postgres: argos_admin bdkairos 127.0.0.1(56303) SELECT        
...
What should  i do to safely close that  queries, before to use kill command in linux? 

I have Postgres 9.4  running on debian jessie.
 


--


To cancel a process with pg_terminate_backend, you need to be a superuser.

So first;

SET ROLE postgres;

Then you should be able to
SELECT pg_terminate_backend(<pid>);   Where <pid> is the pid of process you want to termnate.
--
Melvin Davidson
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.

Re: [GENERAL] I can't cancel/terminate query.

От
Jerry Sievers
Дата:
Edmundo Robles <edmundo@sw-argos.com> writes:

> Hi!  i have  many  too long time queries,  the oldest  is  almost 16
> days, so i  tried to cancel and terminate with pg_cancel_backend and
> pg_terminate_backend  but queries is still running.
>
> STIME     ELAPSED ELAPSED %CPU   PID COMMAND
> jun27 15-23:05:46 1379146  0.3 29660 postgres: argos_admin bdkairos
> 127.0.0.1(55605) SELECT                             
> jun27 15-23:05:46 1379146  0.3 29659 postgres: argos_admin bdkairos
> 127.0.0.1(55604) SELECT                             
> jun27 15-23:05:46 1379146  0.3 29658 postgres: argos_admin bdkairos
> 127.0.0.1(55603) SELECT                             
> jun27 15-23:05:16 1379116  0.3 29909 postgres: argos_admin bdkairos
> 127.0.0.1(55767) SELECT                             
> jun27 15-23:04:51 1379091  0.3 30097 postgres: argos_admin bdkairos
> 127.0.0.1(55909) SELECT                             
> jun27 15-23:03:49 1379029  0.3 30661 postgres: argos_admin bdkairos
> 127.0.0.1(56303) SELECT        
> ...
> What should  i do to safely close that  queries, before to use kill
> command in linux? 
>
> I have Postgres 9.4  running on debian jessie.

Try stracing the catatonic backend.  You will probably find it  hung in
a network send like sendv' or somesuch.

The client side of such a connection is probably still alive but can't
take any more data perhaps due to being  resource starved.  Fully
shutdown such a client if you can locate it.

If this is a no-can-do, there's a way to forge a network packet to
close the blocked socket which you'll have to Google for  if interested.

Else you will have to shutdown -m immediate.  Sorry.

>  
>
>
> --
> [uc]
>
>

--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres.consulting@comcast.net
p: 312.241.7800

Re: [GENERAL] I can't cancel/terminate query.

От
Melvin Davidson
Дата:


On Thu, Jul 13, 2017 at 2:45 PM, Edmundo Robles <edmundo@sw-argos.com> wrote:
i  executed the commands   many times like  superuser but  that queries still running :(   

On Thu, Jul 13, 2017 at 11:10 AM, Melvin Davidson <melvin6925@gmail.com> wrote:


On Thu, Jul 13, 2017 at 11:57 AM, Edmundo Robles <edmundo@sw-argos.com> wrote:
Hi!  i have  many  too long time queries,  the oldest  is  almost 16 days, so i  tried to cancel and terminate with pg_cancel_backend and pg_terminate_backend  but queries is still running.

STIME     ELAPSED ELAPSED %CPU   PID COMMAND
jun27 15-23:05:46 1379146  0.3 29660 postgres: argos_admin bdkairos 127.0.0.1(55605) SELECT                             
jun27 15-23:05:46 1379146  0.3 29659 postgres: argos_admin bdkairos 127.0.0.1(55604) SELECT                             
jun27 15-23:05:46 1379146  0.3 29658 postgres: argos_admin bdkairos 127.0.0.1(55603) SELECT                             
jun27 15-23:05:16 1379116  0.3 29909 postgres: argos_admin bdkairos 127.0.0.1(55767) SELECT                             
jun27 15-23:04:51 1379091  0.3 30097 postgres: argos_admin bdkairos 127.0.0.1(55909) SELECT                             
jun27 15-23:03:49 1379029  0.3 30661 postgres: argos_admin bdkairos 127.0.0.1(56303) SELECT        
...
What should  i do to safely close that  queries, before to use kill command in linux? 

I have Postgres 9.4  running on debian jessie.
 


--


To cancel a process with pg_terminate_backend, you need to be a superuser.

So first;

SET ROLE postgres;

Then you should be able to
SELECT pg_terminate_backend(<pid>);   Where <pid> is the pid of process you want to termnate.
--
Melvin Davidson
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.



--



If you are running on Linux, then:

sudo su
kill <pid>

Where <pid> is the same as in pg_terminate_backend(<pid>)

--
Melvin Davidson
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.