Updating table, precautions?

Hi there,

We need to update a table of about 1.2GB (and about 900k rows) size. I was wondering if I should let the regular cron job take care of clean up (vacuum db Mon-Sat, vacuum full on Sun, followed by Reindex script), or manually do this on the table followed by the update.

This is what I used to find the table size, which probably doesn’t include the index size. Is there a way to find out size of indexes?

select relpages * 8192 as size_in_bytes from pg_class where relnamespace = (select oid from pg_namespace where nspname = 'public') and relname = 'r_itemcategory';

Thanks,

Anjan

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