Re: PostgreSQL - Debian - Processes: postgres: writer process, etc.

On Wed, Feb 15, 2012 at 11:47:58AM +1300, Gavin Flower wrote:
> On 15/02/12 06:16, Bruce Momjian wrote:
>
> On Mon, Jan 30, 2012 at 11:05:10AM -0500, Tom Lane wrote:
>
> What is weird to me is the "COMMAND" column as far as these four processes
> are concerned.
> In the "COMMAND "column I would expect a real command, not a description.
> Can you explain?
>
> We intentionally change the command string reported by ps for each
> postmaster child process, so that you can tell the various processes
> apart. If we did not, every postmaster child would show the exact
> same command string as the postmaster itself was launched with.
> (To get an idea of how useless that is, try looking at "top" sometime
> --- on most systems I've worked with, it ignores the changed command
> strings, so you can't tell what's what.)
>
> I belive the 'c' command in modern versions of top toggles display of
> the current command string.
>
>
> Yes, pressing 'c' when top is running gives a fuller description of the process
> command string, had done in Fedora for longer than I can remember. So I would
> be surprised if any Linux distribution had not had it for several years.

What is also interesting is that it remembers your previous 'c' mode
when you restart top.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +