Re: XID wraparound and busy databases

Zoltan Boszormenyi wrote:
> Tom Lane írta:
>> It's hard to see how anyone could be doing 6K xacts/sec unless most are
>> read-only.
> 
> In a recent stress test with our PostgreSQL-based cluster between two
> machines
> 3 million transaction were performed with "pgbench -c 150 -t 20000 -s 200"
> in about _ten hours_. The primary machine (desktop-level machine for
> development)
> 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...

--  Heikki Linnakangas EnterpriseDB   http://www.enterprisedb.com