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add a diagram

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Gavin 2023-05-14 17:50:51 +02:00 committed by Christian Beikov
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documentation/src/main/asciidoc/introduction/Tuning.adoc
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@ -108,6 +108,8 @@ fundamental rule of thumb in ORM is:
of a session/transaction, and fetch it immediately in one or two queries, of a session/transaction, and fetch it immediately in one or two queries,
- and only then start navigating associations between persistent entities. - and only then start navigating associations between persistent entities.
image:images/fetching.png[width=700,align="center"]
Without question, the most common cause of poorly-performing data access Without question, the most common cause of poorly-performing data access
code in Java programs is the problem of _N+1 selects_. Here, a list of N code in Java programs is the problem of _N+1 selects_. Here, a list of N
rows is retrieved from the database in an initial query, and then rows is retrieved from the database in an initial query, and then

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