Обсуждение: Controlling resource utilization
Hi ,
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.
Saw one parameter as statement_timeout which restricts the queries to not run after a certain time duration and queries will be automatically killed/cancelled. However, I don't see any other options to set this at user level, rather it's getting set for all or at session level. So I want to know if there exists, anyway to control the database resource utilization specific to users?
Regards
Yudhi
Yes sir
SET statement_timeout TO '<milliseconds>'
Atte
JRBM
El mar, 16 abr 2024 a las 14:46, yudhi s (<learnerdatabase99@gmail.com>) escribió:
Hi ,
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.Saw one parameter as statement_timeout which restricts the queries to not run after a certain time duration and queries will be automatically killed/cancelled. However, I don't see any other options to set this at user level, rather it's getting set for all or at session level. So I want to know if there exists, anyway to control the database resource utilization specific to users?RegardsYudhi
On Wed, 17 Apr, 2024, 1:32 am Juan Rodrigo Alejandro Burgos Mella, <rodrigoburgosmella@gmail.com> wrote:
Yes sirSET statement_timeout TO '<milliseconds>'AtteJRBMEl mar, 16 abr 2024 a las 14:46, yudhi s (<learnerdatabase99@gmail.com>) escribió:Hi ,
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.Saw one parameter as statement_timeout which restricts the queries to not run after a certain time duration and queries will be automatically killed/cancelled. However, I don't see any other options to set this at user level, rather it's getting set for all or at session level. So I want to know if there exists, anyway to control the database resource utilization specific to users?RegardsYudhi
This will set the timeout at session level. However, We want to understand, if it can be done at user/role level, so that any such adhoc user queries can be auto killed or cancelled after the set time.
In postgreSQL, that can be done at a session level, or at a general level (in the postgresql.conf configuration file)
Atte
JRBM
El mar, 16 abr 2024 a las 15:18, yudhi s (<learnerdatabase99@gmail.com>) escribió:
On Wed, 17 Apr, 2024, 1:32 am Juan Rodrigo Alejandro Burgos Mella, <rodrigoburgosmella@gmail.com> wrote:Yes sirSET statement_timeout TO '<milliseconds>'AtteJRBMEl mar, 16 abr 2024 a las 14:46, yudhi s (<learnerdatabase99@gmail.com>) escribió:Hi ,
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.Saw one parameter as statement_timeout which restricts the queries to not run after a certain time duration and queries will be automatically killed/cancelled. However, I don't see any other options to set this at user level, rather it's getting set for all or at session level. So I want to know if there exists, anyway to control the database resource utilization specific to users?RegardsYudhiThis will set the timeout at session level. However, We want to understand, if it can be done at user/role level, so that any such adhoc user queries can be auto killed or cancelled after the set time.
De: "Juan Rodrigo Alejandro Burgos Mella" <rodrigoburgosmella@gmail.com>
À: "yudhi s" <learnerdatabase99@gmail.com>
Cc: "pgsql-general" <pgsql-general@lists.postgresql.org>
Envoyé: Mardi 16 Avril 2024 22:29:35
Objet: Re: Controlling resource utilization
Or also at role/user level :In postgreSQL, that can be done at a session level, or at a general level (in the postgresql.conf configuration file)AtteJRBMEl mar, 16 abr 2024 a las 15:18, yudhi s (<learnerdatabase99@gmail.com>) escribió:On Wed, 17 Apr, 2024, 1:32 am Juan Rodrigo Alejandro Burgos Mella, <rodrigoburgosmella@gmail.com> wrote:Yes sirSET statement_timeout TO'<milliseconds>'AtteJRBMEl mar, 16 abr 2024 a las 14:46, yudhi s (<learnerdatabase99@gmail.com>) escribió:Hi ,
We want to have controls around the DB resource utilization by the adhoc user queries, so that it won't impact the application queries negatively. Its RDS postgresql database version 15.4.Saw one parameter as statement_timeout which restricts the queries to not run after a certain time duration and queries will be automatically killed/cancelled. However, I don't see any other options to set this at user level, rather it's getting set for all or at session level. So I want to know if there exists, anyway to control the database resource utilization specific to users?RegardsYudhiThis will set the timeout at session level. However, We want to understand, if it can be done at user/role level, so that any such adhoc user queries can be auto killed or cancelled after the set time.
ALTER ROLE <your-username> SET statement_timeout = '<time_unit>';Gilles
On Wed, 17 Apr, 2024, 12:40 pm , <gparc@free.fr> wrote:
De: "Juan Rodrigo Alejandro Burgos Mella" <rodrigoburgosmella@gmail.com>
À: "yudhi s" <learnerdatabase99@gmail.com>
Cc: "pgsql-general" <pgsql-general@lists.postgresql.org>
Envoyé: Mardi 16 Avril 2024 22:29:35
Objet: Re: Controlling resource utilizationRegardsALTER ROLE <your-username> SET statement_timeout = '<time_unit>';Gilles
Thank you so much. That helps.
This statement is succeeding for user as I executed. So it's working I believe.
But to immediately verify without manually running queries and waiting for it to be auto killed to confirm, Is there any system table which we can verify to see if this setting is effective, as because I don't see any such columns in pg_user or pg_role which shows the statement_timeout.
And is there a way to put similar cap/restrictions on other db resources like cpu, memory, I/O at specific user/role level?
De: "yudhi" <learnerdatabase99@gmail.com>
À: "gparc" <gparc@free.fr>
Cc: "Juan Rodrigo Alejandro Burgos Mella" <rodrigoburgosmella@gmail.com>, "pgsql-general" <pgsql-general@lists.postgresql.org>
Envoyé: Mercredi 17 Avril 2024 09:42:49
Objet: Re: Controlling resource utilization
To verify the setting, you can use this command in psql : \drds <your-username>On Wed, 17 Apr, 2024, 12:40 pm , <gparc@free.fr> wrote:De: "Juan Rodrigo Alejandro Burgos Mella" <rodrigoburgosmella@gmail.com>
À: "yudhi s" <learnerdatabase99@gmail.com>
Cc: "pgsql-general" <pgsql-general@lists.postgresql.org>
Envoyé: Mardi 16 Avril 2024 22:29:35
Objet: Re: Controlling resource utilizationRegardsALTER ROLE <your-username> SET statement_timeout = '<time_unit>';GillesThank you so much. That helps.This statement is succeeding for user as I executed. So it's working I believe.But to immediately verify without manually running queries and waiting for it to be auto killed to confirm, Is there any system table which we can verify to see if this setting is effective, as because I don't see any such columns in pg_user or pg_role which shows the statement_timeout.And is there a way to put similar cap/restrictions on other db resources like cpu, memory, I/O at specific user/role level?
Concerning system resources like CPUs it's not possible.
You can use pg_settings view to see which setting you can change and in which context : https://www.postgresql.org/docs/current/view-pg-settings.html
Regards
Gilles