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database batch updates

Alana Sparx
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Ok, strictly speaking not JDBC (again!)

I have a Sqlserver database that has a half-hourly batch feed from a mainframe. This mainframe is inserting data into a few database fields that require concurrent access to them by a web-based client. Currently, when the feed is happening, performance is severely degraded.

My question: does this feed from the mainframe (there is no push of data from the db --> mainframe) lock access to the table, so do users need to be patient and wait for the batch to end? I'm re-writing the whole application (db schema included), so if there's things I can do to stop this, please advise!

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