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ALTER TABLE ADD COLUMN Hangs - Mailing list pgsql-admin

From Samuel Stearns
Subject ALTER TABLE ADD COLUMN Hangs
Date
Msg-id 68B59BEDCD36854AADBDF17E91B2937A01A4DC6236@EXCHMAIL.staff.internode.com.au
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Howdy,

 

I’m running in an 8.3.3 environment.  What could cause, or how can I diagnose, why an ‘ALTER TABLE <name> ADD COLUMN’ statement runs for hours eventually locking users out and requiring to be killed in the end?

 

Thanks,

 

Sam

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