Re: Help with finding checkpoint code - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Help with finding checkpoint code
Date
Msg-id 200209012236.g81MaPF26080@candle.pha.pa.us
Whole thread Raw
In response to Re: Help with finding checkpoint code  ("J. R. Nield" <jrnield@usol.com>)
List pgsql-hackers
Thanks, got it.

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

J. R. Nield wrote:
> It is called by a special child process of the postmaster after a
> signal. Search for PMSIGNAL_DO_CHECKPOINT in xlog.c and in postmaster.c.
> The checkpoint process gets started out of sigusr1_handler().
> 
> 
> On Sat, 2002-08-31 at 23:27, Bruce Momjian wrote:
> > I am trying to find when WAL log files are rotated.  The message is:
> > 
> >   2002-02-11 21:18:13 DEBUG: recycled transaction log file 0000000000000005
> > 
> > and it is printed in MoveOfflineLogs(), and MoveOfflineLogs() is only
> > called by CreateCheckPoint(), but I can't see where CreateCheckPoint()
> > is called in normal operation.  I see it called by CHECKPOINT, and on
> > startup and shutdown, and from bootstrap, but where is it called during
> > normal backend operation.
> > 
> > -- 
> >   Bruce Momjian                        |  http://candle.pha.pa.us
> >   pgman@candle.pha.pa.us               |  (610) 359-1001
> >   +  If your life is a hard drive,     |  13 Roberts Road
> >   +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
> > 
> > ---------------------------(end of broadcast)---------------------------
> > TIP 2: you can get off all lists at once with the unregister command
> >     (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
> > 
> -- 
> J. R. Nield
> jrnield@usol.com
> 
> 
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
> 

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


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