PGCon 2013

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Estimating query progress

Theory and practice of query progress indication

Your query has been running for 70 hours. Should you kill it now or ignore angry calls for a few more hours and hope it returns the result?

A question many a DBA have asked themselves. This talk will try to cover some of the techniques the database system could use in order to make decisions like that easier. We'll describe an approach based on existing research papers and report on the attempt of implementing it in a useful way inside PostgreSQL.

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