Deep-Dive_-InnoDB-Transactions-and-Write-Paths (1)
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Deep Dive: InnoDB
Transactions and Write Paths
From the client connection to physical storage
Marko Mäkelä, Lead Developer InnoDB
Michaël de Groot, MariaDB Consultant
InnoDB
Concepts
A mini-transaction is an atomic
set of page reads or writes,
with write-ahead redo log.
A transaction writes undo log
before modifying indexes.
The read view of a transaction
may access the undo logs of
newer transactions to retrieve
old versions.
Purge may remove old undo logs
and delete-marked records
once no read view needs them.
Some terms that an Advanced
DBA should be familiar with
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