Re: What does this tell me? - Mailing list pgsql-performance

From Sean Chittenden
Subject Re: What does this tell me?
Date
Msg-id 20021009035043.GC34365@perrin.int.nxad.com
Whole thread Raw
In response to What does this tell me?  ("Josh Berkus" <josh@agliodbs.com>)
Responses Re: What does this tell me?  (Bruce Momjian <pgman@candle.pha.pa.us>)
List pgsql-performance
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E4
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E5
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E6
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E7
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E8
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000E9
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000EA
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000EB
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000EC
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000ED
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000EE
> 2002-10-08 20:37:13 DEBUG:  recycled transaction log file
> 0000000A000000EF
> 2002-10-08 20:37:13 DEBUG:  reaping dead processes
> 2002-10-08 20:37:13 DEBUG:  child process (pid 15270) exited with exit
> code 0
>
> ... repeat ad nauseum.  The problem is, each "recycle transaction
> log ... reaping dead child process" cycle takes about 4-7 minutes
> ...  meaning that the procedure can take up to 1/2 hour to finish,
> and sometimes not finish at all.
>
> Obviously, the system is telling me that it is running out of
> resources somehow.  But I'm at my wit's end to figure out what
> resources, exactly.  Suggestions?

You're running out of WAL log space, iirc.  Increase the number of WAL
logs available and you should be okay.  If you're experiencing this
halfway through, I'd increase the size by 50%, say maybe 60-70% for
good measure.  -sc

--
Sean Chittenden

pgsql-performance by date:

Previous
From: Bruce Momjian
Date:
Subject: Re: What does this tell me?
Next
From: Bruce Momjian
Date:
Subject: Re: What does this tell me?