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If I create an index CONCURRENTLY in PostgreSQL, how can I see when it is finished?

I am attempting to rebuild indexes to solve index bloat, and I need to keep the old index around for a while until the new one has finished, so I need to know when it's finished.

This is PostgreSQL 9.2/3ish

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If I'm not mistaken, concurrently does not mean "in the background". It will still run synchronously - it simply does not take locks on the table to allow concurrent modification to the underlying table. So as soon as your create index is finished, the index is built – a_horse_with_no_name Mar 11 at 10:23
    
@a_horse_with_no_name ah yes, that seems to be correct. If you add this as an actual answer, I can accept it. – Rory Mar 11 at 13:11

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