I am hoping someone might be able to help ascertain if the nightly vacuum that we have set up is actually working correctly.
Every evening we run a Vacuum Analyse on the whole database after a large data import. I am concerned that the vacuum might not be working correctly but to be honest am completely overwhelmed by some of the 'vacuum concepts'. The database log is not showing any error logs but I have gathered the following information if someone could tell me if this is normal.
Information in Log file after database restart
01/08/2009 - Next Transaction ID = 1400435363
01/09/2009 - Next Transaction ID = 1462025864
Transaction_ID Wrapwround limit is 214784146 limited by database postgres
Is this normal, I would have thought the transactional ID would have stayed roughly the same due to vacuum ? If this keeps increasing will it mean I am getting to close my 2 billion transaction limit ?
Running SELECT datname, age(datfrozenxid) FROM pg_database; I get
postgres : 1463012368
maindb : 1078111767
template1 : 1463012368
template0 : 1463012368
Does this look O.K ?
Any help would be really appreciated on this matter
Thanks
Francis
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