From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: maximum number of rows in table - what about oid limits? |
Date: | 2001-06-11 04:37:22 |
Message-ID: | 200106110437.f5B4bMH18423@candle.pha.pa.us |
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Lists: | pgsql-general pgsql-sql |
> "Josh Berkus" <josh(at)agliodbs(dot)com> writes:
> > Given this, why bother with system-generated OIDs on user rows at all?
> > Why not simply reserve the OIDs for the system tables?
>
> An option to not generate OIDs unless requested (on a table-by-table
> basis) has been discussed. It seems like a fine near-term solution
> to me. 8-byte OIDs are a longer-term solution, because they'll break
> a lot of things (including clients...)
>
> >> This is certainly not ideal, but it's not nearly as big a problem as
> >> transaction ID wraparound. You can live with it, whereas right now
> >> xact ID wraparound is catastrophic. That we gotta work on, soon.
>
> > Nothing like reassuring us commercial DB users, Tom. :-P
> > Can you describe what you're talking about?
>
> It's in the archives: after 4G transactions, your database curls up
> and dies. When your pg_log starts to approach 1Gbyte (2 bits per
> transaction) you'd better plan on dump/initdb/reload.
I wonder is we should check the size of pg_log on startup and warn the
administrator?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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