Re: Fwd: Regarding change in the size of database

On Thu, Nov 3, 2016 at 10:06 AM, harish Reddy <harishr536(at)gmail(dot)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(at)gmail(dot)com> wrote:
>
>>
>>
>> On Thu, Oct 27, 2016 at 4:53 PM, harish Reddy <harishr536(at)gmail(dot)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(dot)jayadevan(at)gmail(dot)com> wrote:
>>>
>>>>
>>>> On Wed, Oct 26, 2016 at 9:51 PM, harish Reddy <harishr536(at)gmail(dot)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-confi
>>>> g-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-act
>> ive-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