Re: [HACKERS] posmaster failed under high load

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From:    Oleg Bartunov <oleg @ sai.msu.su> on 05/04/99 11:56 PMTo:    Bruce Momjian <maillist @
candle.pha.pa.us>@SMTP@EXCHANGEcc:   Tatsuo Ishii <t-ishii @ sra.co.jp>@SMTP@EXCHANGE, hackers @
 
postgreSQL.org@SMTP@EXCHANGE Subject:    Re: [HACKERS] posmaster failed under high load
On Tue, 4 May 1999, Bruce Momjian wrote:
> Date: Tue, 4 May 1999 21:35:56 -0400 (EDT)> From: Bruce Momjian <maillist@candle.pha.pa.us>> To: Oleg Bartunov
<oleg@sai.msu.su>>Cc: Tatsuo Ishii <t-ishii@sra.co.jp>, hackers@postgreSQL.org> Subject: Re: [HACKERS] posmaster failed
underhigh load> > > My machine was very-very load during this test - I saw peak> > load about 65, a lot of swapping but
testcompletes and system> > after 20 minutes of swapping remains usable. I still saw many> > postmasters (not postgres)
processesrunning but after about > > 30-40 minutes they gone. Actually pstree -a now shows> >  > >  |-postmaster -i -B
1024-S -D/usr/local/pgsql/data/ -o -Fe> >   |  |-(postmaster)> >   |  `-postmaster > > ps should show our process
listingdisplay change.  They are
 
postgres> processes, but without the exec() call we used to do, it shows
this way> only on OS's that don't support ps arg display changes from inside
the> process.
No, it does on Linux. 5159  ?  S    0:00 postmaster -i -B 1024 -S
-D/usr/local/pgsql/data/ -o -Fe  5168  ?  S    0:00 /usr/local/pgsql/bin/postgres localhost httpd
apod idle  5169  ?  S    0:00 /usr/local/pgsql/bin/postgres localhost httpd
apod idle  5170  ?  S    0:00 /usr/local/pgsql/bin/postgres localhost httpd
apod idle  5171  ?  S    0:00 /usr/local/pgsql/bin/postgres localhost httpd
apod idle 
That's why I noticed 10 or more (postmaster) processes, which
eventuallygone after 30-40 minutes.
    Oleg
> > > > -- >   Bruce Momjian                        |
http://www.op.net/~candle>   maillist@candle.pha.pa.us            |  (610) 853-3000>   +  If your life is a hard drive,
   |  830 Blythe Avenue>   +  Christ can be your backup.        |  Drexel Hill,
 
Pennsylvania 19026> 
_____________________________________________________________Oleg Bartunov, sci.researcher, hostmaster of
AstroNet,SternbergAstronomical Institute, Moscow University (Russia)Internet: oleg@sai.msu.su,
http://www.sai.msu.su/~megera/phone:+007(095)939-16-83, +007(095)939-23-83