Thread

1. Re: [HACKERS] posmaster failed under high load

   Tom Lane <tgl@sss.pgh.pa.us> — 1999-05-06T14:20:06Z

   Bruce Momjian <maillist@candle.pha.pa.us> writes:
   >> The only way to get around this is to do an execv(), at which point the
   >> kernel will recopy argv[0].
   
   > We used to do execv(), but stopped doing it for performance reasons.
   
   It's clearly not worth re-introducing the exec call just to make ps
   status display work (especially since it's only failing when the backend
   is swapped out).  However, I wonder whether there is another answer.
   
   Something that's been on my to-do list since the ps-status-display code
   got added is to import "sendmail"'s ps-status-display module lock, stock,
   and barrel.  Sendmail's code is kinda ugly, but it's been wrung out and
   works on a wide variety of Unixes.  The code we have doesn't ... (it's
   never worked on my HPUX box, for instance, whereas sendmail does).
   
   I have no idea at the moment whether sendmail knows how to change the
   task_struct on Linux; but it might.
   
   			regards, tom lane
   
   

2. Re: [HACKERS] posmaster failed under high load

   Oleg Broytmann <phd@sun.med.ru> — 1999-05-06T14:43:39Z

   On Thu, 6 May 1999, Tom Lane wrote:
   > Something that's been on my to-do list since the ps-status-display code
   > got added is to import "sendmail"'s ps-status-display module lock, stock,
   > and barrel.  Sendmail's code is kinda ugly, but it's been wrung out and
   > works on a wide variety of Unixes.  The code we have doesn't ... (it's
   > never worked on my HPUX box, for instance, whereas sendmail does).
   
      The code was touched by wu-ftpd authors once. When I thought of stealing
   the code I found sources in wu-ftpd distribution a little cleaner.
   
   > 			regards, tom lane
   
   Oleg.
   ---- 
       Oleg Broytmann     http://members.xoom.com/phd2/     phd2@earthling.net
              Programmers don't die, they just GOSUB without RETURN.