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Displaying posts with tag: trx_list scan (reset)

trx descriptors: MySQL performance improvements in Percona Server 5.5.30-30.2
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One major problem in terms of MySQL performance that still stands in the way of InnoDB scalability is the trx_list scan on consistent read view creation. It was originally reported as a part of MySQL bug #49169 and can be described as follows. Whenever a connection wants to create a consistent read, it has to make a snapshot of the transaction states to determine which transactions are seen in the view later. To this …

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