Обсуждение: Upgrade postgresql from 9.1 to 9.6

I'd grep for all processes owned by postgres, since the pg_upgrade processes 
probably spawn children.

On 07/23/2018 12:14 PM, Sohel Tamboli wrote:
> Hi,
>
> I am trying to upgrade my postgresql database from version 9.1 to 9.6 
> using pg_upgrade utility.
> I have started this activity with 6 threads and running with no issues but 
> I can see only 2 active threads of pg_upgrade  when checked on OS using 
> "ps -ef| grep pg_upgrade" which might slow down my upgrade process.
> Is there any limit of adding jobs in "-j" parameter in pg_upgrade utility?
> Or is there any settings that I need to configure in postgresql.conf file?
>
> Below are the configuration of my server:
> OS : Amazon Linux
> RAM: 64GB
> CPU: 16
> DB size : 5 TB
> Upgrade utility : pg_upgrade
> Jobs: 6
> Issue : only 2 threads of pg_upgrade are active
>
> Appreciate your help!!
>
> Thanks,
> Sohel

-- 
Angular momentum makes the world go 'round.

On Tue, Jul 24, 2018 at 10:36:34AM +0530, Sohel Tamboli wrote:
> Hi Ron, 
> 
> Thanks!! 
> I tried to grep all the process owned by postgres as well, but got same
> results.  No other process are active other than two threads of pg_upgrade. 

pg_upgrade can only parallelize a few things --- from the docs:

    The <option>--jobs</option> option allows multiple CPU cores
    to be used for copying/linking of files and to dump and reload
    database schemas in parallel;

My guess is that there were not more than two things that could be
parallelized.

---------------------------------------------------------------------------


> 
> Thanks, 
> Sohel
> 
> On 23-Jul-2018 10:53 pm, "Ron" <ronljohnsonjr@gmail.com> wrote:
> 
>     I'd grep for all processes owned by postgres, since the pg_upgrade
>     processes probably spawn children.
> 
> 
>     On 07/23/2018 12:14 PM, Sohel Tamboli wrote:
> 
>         Hi,
> 
>         I am trying to upgrade my postgresql database from version 9.1 to 9.6
>         using pg_upgrade utility.
>         I have started this activity with 6 threads and running with no issues
>         but I can see only 2 active threads of pg_upgrade  when checked on OS
>         using "ps -ef| grep pg_upgrade" which might slow down my upgrade
>         process.
>         Is there any limit of adding jobs in "-j" parameter in pg_upgrade
>         utility?
>         Or is there any settings that I need to configure in postgresql.conf
>         file?
> 
>         Below are the configuration of my server:
>         OS : Amazon Linux
>         RAM: 64GB
>         CPU: 16
>         DB size : 5 TB
>         Upgrade utility : pg_upgrade
>         Jobs: 6
>         Issue : only 2 threads of pg_upgrade are active
> 
>         Appreciate your help!!
> 
>         Thanks,
>         Sohel
> 
> 
>     --
>     Angular momentum makes the world go 'round.
> 
> 
> 

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

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