[GENERAL] PostgrSQL server : CPU and Memory

[kaustubh kelkar]

Hi ,

I am a developer and I want to monitor metrics related to CPU and Memory of
PostgreSQL server only using SQL queries.

Do we have any system tables which can give us the data? I have found this
one
https://aaronparecki.com/2015/02/19/8/monitoring-cpu-memory-usage-from-postgres

but dont know whether it is exactly the same what I need.

I am able to fetch the same using scripts (batch/shell) but getting data
from SQL will be my main task.

-- 

Kaus2bh Kelkar

Re: [GENERAL] Fwd: Mail to be posted in PostgreSQL community

[kaustubh kelkar]

Hi Venkata,

Thanks for prompt reply.
OS user is administrator user. So, I don't know why there are issues. Can
anyone suggest me steps to do the same?
On 15-Nov-2016 2:26 pm, "Venkata B Nagothi"  wrote:

>
> On Tue, Nov 15, 2016 at 4:15 PM, kaustubh kelkar 
> wrote:
>
>>
>> Hi,
>>
>>
>>
>> Trying to create multiple database instances of PostgreSQL 9.6
>> In this case , trying to create 2nd instance with port 5434/5435.
>>
>>
>>
>> *1st attempt:*
>>
>>
>>
>>
>> *Create new database cluster : *
>>
>> C:\Program Files\PostgreSQL\9.6\installer\server>initcluster.vbs
>> postgres postgr
>>
>> es 12345 "C:\Program Files\PostgreSQL\9.6" "C:\Program
>> Files\PostgreSQL\9.6\data
>>
>> 5434" 5433 DEFAULT
>>
>>
>>
>> *Register as Windows Service: *
>>
>> C:\Program Files\PostgreSQL\9.6\installer\server>startupcfg.vbs 9.6
>> postgres 123
>>
>> 45 "C:\Program Files\PostgreSQL\9.6" "C:\Program
>> Files\PostgreSQL\9.6\data5434"
>>
>> postgresql-x64-9.6-5434
>>
>>
>>
>> But after this step, new service is supposed to be found in services.msc
>> which is not successful.
>>
>> (Reference http://stackoverflow.com/questions/6241793/are-independent-i
>> nstances-of-postgresql-possible )
>>
>>
>>
>> *2nd attempt :*
>>
>>
>>
>> *Create new database cluster : *
>>
>> C:\Program Files\PostgreSQL\9.6\bin>initdb C:\PostgreSQL\9.6\data5435
>>
>> The files belonging to this database system will be owned by user
>> "Administrator
>>
>> ".
>>
>> This user must also own the server process.
>>
>>
>>
>> The database cluster will be initialized with locale "English_United
>> States.1252
>>
>> ".
>>
>> The default database encoding has accordingly been set to "WIN1252".
>>
>> The default text search configuration will be set to "english".
>>
>>
>>
>> Data page checksums are disabled.
>>
>>
>>
>> creating directory C:/PostgreSQL/9.6/data5435 ... ok
>>
>> creating subdirectories ... ok
>>
>> selecting default max_connections ... 100
>>
>> selecting default shared_buffers ... 128MB
>>
>> selecting dynamic shared memory implementation ... windows
>>
>> creating configuration files ... ok
>>
>> running bootstrap script ... ok
>>
>> performing post-bootstrap initialization ... ok
>>
>> syncing data to disk ... ok
>>
>>
>>
>> WARNING: enabling "trust" authentication for local connections
>>
>> You can change this by editing pg_hba.conf or using the option -A, or
>>
>> --auth-local and --auth-host, the next time you run initdb.
>>
>>
>>
>> Success. You can now start the database server using:
>>
>>
>>
>> "pg_ctl" -D "C:\PostgreSQL\9.6\data5435" -l logfile start
>>
>>
>> *Register as Windows Service: *
>>
>>
>> C:\Program Files\PostgreSQL\9.6\bin>pg_ctl register -N pgsql-9.6-5435 -U
>> administrator -P test@123 -D "C:\PostgreSQL\9.6\data5435" -o "-p 5435"
>>
>>
>>
>> C:\Program Files\PostgreSQL\9.6\bin>net start pgsql-9.6-5435
>>
>> The pgsql-9.6-5435 service is starting.
>>
>> The pgsql-9.6-5435 service was started successfully.
>>
>>
>>
>> (Reference: http://www.dbforums.com/showthread.php?1669767-How-to-create
>> -two-different-postgresql-services-for-configure-database  )
>>
>>
>>
>> *After trying to login through SQL shell*
>>
>> Server [localhost]:
>>
>> Database [postgres]:
>>
>> Port [5433]: 5435
>>
>> Username [postgres]:
>>
>> psql: FATAL:  role "postgres" does not exist
>>
>
> As which user (OS user account) you have created the postgresql instance ?
> which means, you need to login as "Administrator" user.
>
> Regards,
>
> Venkata B N
> Database Consultant
>
> Fujitsu Australia
>
>

Re: [GENERAL] Fwd: Creating multiple instances of postresql on Windows environment

[kaustubh kelkar]

Hi,

The issue is not with server , it is running fine .
Issue is not with port either , for local machine,  I guess firewall won't
affect.


On Tue, Nov 8, 2016 at 8:14 PM, Adrian Klaver 
wrote:

> On 11/07/2016 07:27 PM, kaustubh kelkar wrote:
>
>>
>> Hi ,
>>
>> I am a PostgreSQL user who wants to create multiple instances of
>> PostgreSQL database server. I am using PostgreSQL 9.4 and above. 
>>
>> I tried to create more than 2 instances on Linux environment in which I
>> was successful. But, for windows environment, I tried with the help of
>> pgAdmin4 and with the help of commands (initdb and some more commands.)
>> In both cases , there is some issue related to the ports. Please find
>> the attached screenshot for the reference.
>>
>
> To run more then one instance of Postgres on one machine each needs its
> own port. Have you done that?
>
> The screenshot indicates a different problem, namely pgAdmin(?) cannot
> find a running server on port 5434 on the localhost. There can be several
> reasons for this:
>
> 1) The server is not running, eg the start up script failed.
> Solution: Verify the server has actually started
>
> 2) The server is not running on localhost.
> Solution: Verify where it is hosted.
>
> 3) It is running on localhost but not on port 5434.
> Solution: Verify that the port variable in postgresql.conf for
> that instance is set to 5434 and that the server was restarted to see the
> change.
>
> 3) It is running and is using port 5434, but a firewall rule is blocking
> access.
> Solution: Check whether you have a firewall running and whether it
> is blocking port 5434.
>
>
>> __ __
>>
>> Please help me to resolve the issue.
>> 
>>
>> __ __
>>
>>
>>
>>
>>
>>
>
> --
> Adrian Klaver
> adrian.kla...@aklaver.com
>



-- 

Kaus2bh Kelkar

[GENERAL] Fwd: Mail to be posted in PostgreSQL community

[kaustubh kelkar]

Hi,



Trying to create multiple database instances of PostgreSQL 9.6
In this case , trying to create 2nd instance with port 5434/5435.



*1st attempt:*




*Create new database cluster : *

C:\Program Files\PostgreSQL\9.6\installer\server>initcluster.vbs postgres
postgr

es 12345 "C:\Program Files\PostgreSQL\9.6" "C:\Program
Files\PostgreSQL\9.6\data

5434" 5433 DEFAULT



*Register as Windows Service: *

C:\Program Files\PostgreSQL\9.6\installer\server>startupcfg.vbs 9.6
postgres 123

45 "C:\Program Files\PostgreSQL\9.6" "C:\Program
Files\PostgreSQL\9.6\data5434"

postgresql-x64-9.6-5434



But after this step, new service is supposed to be found in services.msc
which is not successful.

(Reference http://stackoverflow.com/questions/6241793/are-
independent-instances-of-postgresql-possible )



*2nd attempt :*



*Create new database cluster : *

C:\Program Files\PostgreSQL\9.6\bin>initdb C:\PostgreSQL\9.6\data5435

The files belonging to this database system will be owned by user
"Administrator

".

This user must also own the server process.



The database cluster will be initialized with locale "English_United
States.1252

".

The default database encoding has accordingly been set to "WIN1252".

The default text search configuration will be set to "english".



Data page checksums are disabled.



creating directory C:/PostgreSQL/9.6/data5435 ... ok

creating subdirectories ... ok

selecting default max_connections ... 100

selecting default shared_buffers ... 128MB

selecting dynamic shared memory implementation ... windows

creating configuration files ... ok

running bootstrap script ... ok

performing post-bootstrap initialization ... ok

syncing data to disk ... ok



WARNING: enabling "trust" authentication for local connections

You can change this by editing pg_hba.conf or using the option -A, or

--auth-local and --auth-host, the next time you run initdb.



Success. You can now start the database server using:



"pg_ctl" -D "C:\PostgreSQL\9.6\data5435" -l logfile start


*Register as Windows Service: *


C:\Program Files\PostgreSQL\9.6\bin>pg_ctl register -N pgsql-9.6-5435 -U
administrator -P test@123 -D "C:\PostgreSQL\9.6\data5435" -o "-p 5435"



C:\Program Files\PostgreSQL\9.6\bin>net start pgsql-9.6-5435

The pgsql-9.6-5435 service is starting.

The pgsql-9.6-5435 service was started successfully.



(Reference: http://www.dbforums.com/showthread.php?1669767-How-to-
create-two-different-postgresql-services-for-configure-database  )



*After trying to login through SQL shell*

Server [localhost]:

Database [postgres]:

Port [5433]: 5435

Username [postgres]:

psql: FATAL:  role "postgres" does not exist

Press any key to continue . . .

 * *

Kaus2bh Kelkar

[GENERAL] Fwd: Creating multiple instances of postresql on Windows environment

[kaustubh kelkar]

Hi ,

I am a PostgreSQL user who wants to create multiple instances of PostgreSQL
database server. I am using PostgreSQL 9.4 and above.

I tried to create more than 2 instances on Linux environment in which I was
successful. But, for windows environment, I tried with the help of pgAdmin4
and with the help of commands (initdb and some more commands.) In both
cases , there is some issue related to the ports. Please find the attached
screenshot for the reference.



Please help me to resolve the issue.

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