Inefficient session "data" handling via "dbtable" session save handler #8308
Labels
c: Performance
For when we could improve the performance / speed of Matomo.
Task
Indicates an issue is neither a feature nor a bug and it's purely a "technical" change.
Milestone
If a value of the session is updated, the data field of piwik_session gets fully rewritten (it's a text blob) instead of simply updating the one value.
This text blob is already a data structure - but not a data structure mysql understands. This breaks mysql database replication binlog, because this change is logged there (to apply it to an other server) and causes higher database traffic as needed.
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