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This is how Postgres was designed from ground up (as opposed to SQL Server where this was added very late) See the manual for details: http://www.postgresql.org/docs/current/static/mvcc-intro.html You can't actually configure Postgres so that readers would block writers (automatically or implicitly) The only way to block read access in Postgres is to ...


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Check with the business team to see if you can restructure the business process so that you can start and comit a new transaction for each row in the excel file. If anything failed, record the fail rows so that they would know which row was successful and which one failed



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