Alvaro Herrera writes:
How large is the database? I must admit I have never seen a database
that took 4 days to vacuum. This could mean that your database is
humongous, or that the vacuum strategy is wrong for some reason.
Specially with 16GB of RAM.
I have a setup with several databases (the largest of which is 1TB database)
and I do a nightly vacuum analyze for ALL databases. It takes about 22
hours. And this is with constant updates to the large 1TB database. This is
with Postgresql 8.1.3
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TIP 5: don't forget to increase your free space map settings
