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Re: [HACKERS] Bgwriter behavior

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,Gavin Sherry <swm(at)linuxworld(dot)com(dot)au>,PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>,pgsql-patches(at)postgresql(dot)org
Subject: Re: [HACKERS] Bgwriter behavior
Date: 2005-01-07 05:17:41
Message-ID: 200501070517.j075Hfw27917@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
Do we want to add this additional log infor to CVS for 8.0?

---------------------------------------------------------------------------

Simon Riggs wrote:
> On Mon, 2005-01-03 at 19:14 -0500, Bruce Momjian wrote:
> > Simon Riggs wrote:
> > > Here's my bgwriter instrumentation patch, which gives info that could
> > > allow the bgwriter settings to be tuned.
> > 
> > Uh, what does this do exactly?  Add additional logging output?
> > 
> 
> Produces output like this...
> 
> DEBUG:ARC T1target=  45 B1len= 4954 T1len=   40 T2len= 4960 B2len=   46
> DEBUG:ARC total   =  98% B1hit=   0% T1hit=   0% T2hit=  98% B2hit=   0%
> DEBUG:ARC buffer dirty misses=   22% (wasted=    0); cleaned=     4494
> 
> when you have debug_shared_buffers (= n) set
> and you have server messages DEBUG1 available.
> 
> The last line of log output has been replaced by this version.
> 
> -- 
> Best Regards, Simon Riggs
> 
> 
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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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