WARNING: some databases have not been vacuumed in 1953945422 transactions

Hello,

 

we are using PostgreSQL 8.0.3 and have two databases in one cluster. db1 and db2.

Each night a shell script is being executed.

 

vacuumdb --analyze -U cmduser db1

vacuumdb --analyze -U cmduser db2

 

The last weeks the following warnings are given out:

WARNING:  some databases have not been vacuumed in 1953945422 transactions
HINT:  Better vacuum them within 193538225 transactions, or you may have a wraparound failure.

 

Now I made the sql-statement:

SELECT datname, age(datfrozenxid) FROM pg_database;

 

 Yesterday I got this result: 

 

Today I got the following result:

 

datname	age
db1	1.075.558.667
db2	1.075.513.031
template1	1.955.716.521
template0	1.955.716.521

 

Why are there changes of the databases template1 and template0 ?!?

 

Is this critical?

 

Regards

Michaela