Re: [BUGS] Bug #613: Sequence values fall back to previously chec - Mailing list pgsql-hackers

From 'Ben Grimm'
Subject Re: [BUGS] Bug #613: Sequence values fall back to previously chec
Date
Msg-id 20020315094435.A22938@zaeon.com
Whole thread Raw
In response to Re: [BUGS] Bug #613: Sequence values fall back to previously chec  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Fri, 15 Mar 2002, Tom Lane wrote:

> "'Ben Grimm'" <bgrimm@zaeon.com> writes:
> > When these bugs are fixed there is still the issue of bug #3 that I 
> > came across.  The one that I work around by resetting log_cnt to 0 when a 
> > backend initializes a sequence.  It's this third bug that made the other 
> > two so apparent.  Fixing them does not obviate the need to fix this one.
> 
> What's bug #3?  I don't recall a third issue.
> 

The problem I was seeing before is that when the postmaster was shutdown 
properly, log_cnt in the sequence record was saved with whatever value it 
had at the time.  So when it loaded from disk it would have a value greater 
than zero resulting in no XLogInsert until you'd exceded log_cnt calls to
nextval.  

AFAICT, your patch fixes this problem, as I can't reproduce it now.  

Thanks!

-- Ben


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