VACUUM ANALYZE : Is this a time consuming procedure?

Dear group,

Is vacuum analyze a time consuming procedure. On a
scale of 1 to 10 my database is on 4.
Today I ran a vacuum analyze command and it is taking
for ever. I am worried? Is some thing wrong going on
or it usually takes time given no VACUUMing is done
before on the database.
Pls. suggest, if something is really wrong, I can halt
the process.

Thank,
kumar.



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