Re: transaction ID wraparound - should I use 'VACUUM' or 'VACUUM FULL' ?

Michal Szymanski wrote:
> Hi,
> In old version of Postgres we have to execute 'VACUUM FULL' to solve
> problem of  transaction ID wraparound, do we need to execute 'VACUUM
> FULL' in Postgres 8.3 or 8.4 to avoid this problem?

No, plain VACUUM suffices.

> How to check using SQL if  transaction ID is close to wraparound?

See age(datfrozenxid) FROM pg_database, but ignore system databases.

--
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.