On Thu, Jun 6, 2013 at 2:12 PM, Ray Cote
<rgac...@appropriatesolutions.com>wrote:

> It is Postmaster itself:
> 11068                 -              315.9M
> 136K                  0K               85%             postmaster
> 11000                 -              56808K
> 8K                  0K               15%             postmaster
> 11003                 -                  0K
> 80K                  0K                0%             postmaster
> 11004                 -                  0K
> 24K                  0K                0%             postmaster
> 11067                 -                  0K
> 0K                  0K                0%             load_rets.py
>
> The above are the atop lines for just postmaster. This is a 10s snapshot
> so you can see lots of read activity.
> The load_rets.py task is the Python script loading the database.
>


The postmaster has many children, each of which is responsible for
something different.  If you display the full command line rather than just
the abbreviated one, it will give you more info on exactly which child is
using the disk, for example:


  PID  DSK COMMAND-LINE
 3950  16% postgres: jjanes jjanes [local] UPDATE
 2978   0% postgres: checkpointer process
 2982   0% postgres: stats collector process


Cheers,

Jeff

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