Re: ERROR: canceling statement due to statement timeout

On 01/11/2017 04:31 PM, Patrick B wrote:
> 2017-01-12 13:23 GMT+13:00 Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>:
>
> On 01/11/2017 04:08 PM, Patrick B wrote:
>
> Hi guys,
>
> I'm using PostgreSQL 9.2 in two different servers.
>
> server1 (Master Postgres DB server, running Postgres 9.2 / 128GB
> ram) -
> RAID 10 Magnetic disks
> server2 (Master Postgres DB server, running Postgres 9.2 / 128GB
> ram) -
> EBS (AWS) io2 10k IOPS
>
> When I run a query, I get this error:
>
> ERROR: canceling statement due to statement timeout
>
> statement_timeout is 0 in both servers.
>
> However, on server1 I am able to run the query. Only on server2
> that I
> get that error.
>
> Why? If it is same DB???
>
>
> It is not the same DB if it is on two different servers not
> connected by replication. More to the point statement_timeout is a
> client connection setting, so is the client you use to connect to
> server2 the same as the one you use for server1?
>
> Is AWS being 'helpful' and setting a timeout?
>
> Is there anything in the log before the ERROR shown above that
> indicates something is setting statement_timeout?
>
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>
>
> Same database, different database servers; server1 is the old Master
> server and I'm using it to compare.
>
> It is not the client, because if I run the query manually using explain
> analyze i get the error:

Well that is a client also.

Are you sure there is not something in your AWS setup that is doing this?

>
> live_db=> explain analyze
>
> SELECT DISTINCT id0
> FROM
> (SELECT
>
> [...]
>
> ERROR: canceling statement due to statement timeout
>
>
> just a remind that on server1 works, but on server2 it doesn't.

Server1 is not on AWS and server2 is, see above.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com