Re: XID wraparound and busy databases

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Zoltan Boszormenyi <zb(at)cybertec(dot)at>
Cc: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: XID wraparound and busy databases
Date: 2007-08-15 19:57:45
Message-ID: 200708151957.l7FJvjk11780@momjian.us
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Zoltan Boszormenyi wrote:
> >> used a real disk, the secondary used tmpfs as PGDATA. Say whatever you want
> >> about my disk lying about flush, its 75MB/sec transfer rate transfer
> >> rate is real.
> >> So 5 million "real" transaction in 24 hours is not unrealistic.
> >>
> >
> > 6k xacts / s is five *hundred* million transactions, not five million...
> >
>
> Blush. :-) You're right. However a single machine with ramdisk is able
> to do that.

A battery-backed hard disk controller card can do that too.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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