Re: does wal archiving block the current client connection?

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On Fri, 2006-05-19 at 08:53 -0700, Jeff Frost wrote:
> On Fri, 19 May 2006, Tom Lane wrote:
> 
> > Jeff Frost <jeff@xxxxxxxxxxxxxxxxxxxxxx> writes:
> >> Do you think the postmaster on 5432 is trying to archive the other
> >> postmaster's WAL files somehow?
> >
> > Not as long as they aren't in the same data directory ;-).  What Simon
> > was wondering about was whether an archiver process had somehow been
> > left over from a previous incarnation of the test postmaster.  The thing
> > to do is look through "ps auxww" (or local equivalent) and see if you
> > see more than one thing calling itself an archiver process.
> >
> > (Whether or not this explains Jeff's problem, it definitely seems like
> > a failure mode that we need to guard against.  We go to great lengths
> > to prevent a new postmaster from starting when there are still live
> > backends from a previous postmaster, but I don't think that interlock
> > is effective for the archiver.)
> 
> Well now, will you look at this:
> 
> postgres 20228     1  0 May17 ?        00:00:00 postgres: archiver process
> postgres 20573     1  0 May17 ?        00:00:00 postgres: archiver process
> postgres 23817 23810  0 May17 pts/11   00:00:00 postgres: archiver process
> 
> 23810 is the running postmaster:
> 
> postgres 23810     1  0 May17 pts/11   00:03:01 /usr/local/pgsql-8.1.3/bin/postm
> 
> do you think that got left around the last time I did a pg_ctl restart?

OK, I'm on it.

-- 
  Simon Riggs             
  EnterpriseDB   http://www.enterprisedb.com



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