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Displaying posts with tag: Pecona Server 5.5.30-30.2 (reset)

Memory allocators: MySQL performance improvements in Percona Server 5.5.30-30.2
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In addition to the problem with trx_list scan we discussed in Friday’s post, there is another issue in InnoDB transaction processing that notably affects MySQL performance – for every transaction InnoDB creates a read view and allocates memory for this structure from heap. The problem is that the heap for that allocation is destroyed on each commit and thus the read view memory is reallocated on the next transaction.

There

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