Re: Fwd: Regarding change in the size of database - Mailing list pgsql-sql

Thank you I am analyzing my query statics. So i want to know how many connections that postgres database may support and any way to archive  my database.   

On Fri, Nov 4, 2016 at 10:03 AM, Amitabh Kant <amitabhkant@gmail.com> wrote:

On Thu, Nov 3, 2016 at 10:06 AM, harish Reddy <harishr536@gmail.com> wrote:

Hi amitabhkhant sir
Thank you so much for your answer ,
I have upgraded my postgres to 9.3 and we are lagging lot with performance and could you suggest me the best possible parameters to active connections of 200 and could you suggest how to install pgbouncer in postgres 9.3 and setting up it

Thanks and Regards
Harish Reddy

On Nov 3, 2016 9:20 AM, "Amitabh Kant" <amitabhkant@gmail.com> wrote:

On Thu, Oct 27, 2016 at 4:53 PM, harish Reddy <harishr536@gmail.com> wrote:

Hi Sir, 

Thank you for you feedback my postgres is running on 9.1 version and when i checked  that autovacuum in  my production by command ps -axww | grep autovacuum it says the output as it has some process running with this id so how to solve my problem but in postgress config file it was commented.

My application is an online ERP which is supported by openbravo has an users of about 150(arount 50 active users) with it and could you suggest me the perfect variables to set us in postgres config file. 

The system has a RAM of 16 GB and the following variables 

Variable	Setting value
max_connections	200
shared_buffers	4096MB
work_mem	24MB
maintenance_work_mem	512MB
effective_cache_size	4096MB

 

On Thu, Oct 27, 2016 at 9:04 AM, Jayadevan M <maymala.jayadevan@gmail.com> wrote:

On Wed, Oct 26, 2016 at 9:51 PM, harish Reddy <harishr536@gmail.com> wrote:

Hi Jayadevan,

Firstly Thank you so much for your valuable information provided, So what should i do for increasing my database performance? and could you suggest me how to continue to the vacuum process and will it decrease my database performance?

 

Please read this article

https://wiki.postgresql.org/wiki/Guide_to_reporting_problems

i.e - "Mention your database version", "A description of what you are trying to achieve and what results you expect" etc etc.

And this.

https://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server

 

Do you have autovacuum working? 

https://www.postgresql.org/docs/current/static/runtime-config-autovacuum.html

 

Try installing pgbouncer for connection pooling if you need 200 active connections. You can check for active connections using answers on this page: http://serverfault.com/questions/128284/how-to-see-active-connections-and-current-activity-in-postgresql-8-4

Another suggestion that might come your way is to upgrade your postgres version as 9.1 has recently been made EOL. 

"explain analyze" can be used to debug slow queries. See this page for more info: https://www.postgresql.org/docs/9.1/static/sql-explain.html

If you need further help, you will have to be more specific on what performance problems you are facing, with their explain anaylze output for folks here to help you out.

Amitabh

There are no "best possible parameters" without knowing what is the nature of problem. More specifically, which queries are getting slow. Run your queries with "explain analyze verbsose" on queries which are getting slow, and then post back here to get better answers. 

You will also have to give more info about your OS etc for folks here to help you out. This was suggested to you earlier: https://wiki.postgresql.org/wiki/Guide_to_reporting_problems

For pgbouncer, see this https://pgbouncer.github.io

Amitabh