On Thu, 2020-05-14 at 16:26 +0800, Andy Fan wrote: > Thanks, actually I don't know how to use prepared transaction and how it works. > I care about this because there is a long prepared transaction exists in our customer, > and we want to know what this transaction has done（like any data it changed). > All the things I know is the data comes from pg_prepared_xact, but it doesn't help a lot. Idf you have the transaction ID from "pg_prepared_xact", you could check what locks are held: SELECT * FROM pg_locks WHERE transactionid = ...; Than might give you a clue. Using prepared transactions without a transaction manager that keeps track of them and cleans up if necessary is dangerous. Yours, Laurenz Albe -- +43-670-6056265 Cybertec Schönig & Schönig GmbH Gröhrmühlgasse 26, A-2700 Wiener Neustadt Web: https://www.cybertec-postgresql.com
