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Re: pgstat wait timeout

From: Robert Schnabel <schnabelr(at)missouri(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: pgstat wait timeout
Date: 2009-07-24 13:58:32
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Lists: pgsql-bugs
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Tom Lane wrote:
<blockquote cite="mid:22055(dot)1247067802(at)sss(dot)pgh(dot)pa(dot)us" type="cite">
  <pre wrap="">Robert Schnabel <a class="moz-txt-link-rfc2396E" href="mailto:schnabelr(at)missouri(dot)edu">&lt;schnabelr(at)missouri(dot)edu&gt;</a> writes:
  <blockquote type="cite">
    <pre wrap=""> From a fresh server restart I have one process that will run one 
processor 100% essentially forever.  (I've let it go for about a week 
just to see if it would ever stop and it didn't).  Attached is a text 
dump from ProcessExplorer.  I have highlighted the relevant lines with 
****.  Also attached is the current postgresql log after a server 
restart.  You can see from the log that about every 70 seconds there is 
an entry "WARNING:  pgstat wait timeout".  This will go on forever.  
  <pre wrap=""><!---->
Apparently the stats collector has gotten stuck in a loop and is failing
to update the stats file.  The 'wait timeout' bleats are probably coming
from the autovacuum launcher process, which is waiting for an up-to-date
stats file to appear.  Can you get a stack trace from the stats
collector process?

			regards, tom lane
Sorry for the delayed response to this but I just had too many fires to
put out.&nbsp; In the mean time, this problem seems to have cured itself.&nbsp; I
rebooted my computer yesterday (Windows XP), the postgres service
started and I'm no longer having an issue.&nbsp; I had not rebooted since I
upgraded to 8.4 but it seems to have done the trick.&nbsp; Previously in
8.3.7 I would have this problem every time I would reboot.<br>

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