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Roadmap 1. What had happened was… 2. Looking under the Hood 3. Batching the Batch 4. Why you tellin’ me this? 4

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What to expect from this talk? 5 Vlad Mihalcea

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Do it RIGHT. What had happened was… 01

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The Tale of the Item Availability 7

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The Architecture 8

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Soooooo much Data 9

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Soooooo much Data 10

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What any seasoned developer would do… 11 More Pods More Database Connections Check for slow Queries

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What any seasoned developer would do… 12

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Do it RIGHT. Looking under the Hood 02

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DataSourceProxy? 14

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DataSourceProxy! 15 Query Logging Slow Query Logging Query Count Tracing Method

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The n+1 Problem 16

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The n+1 Problem 17

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Do it RIGHT. Batching the Batch 03

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Making the Batch batch 19 Align sequence allocationSize with batch size Implementing Persistable for isNew = true @Embeddable for WHERE (field1, field2) IN (?,?)

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Do it RIGHT. Why you tellin‘ me this? 04

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Get to know the Tools you inevitably (are doomed to) work with

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Big Thanks! & ways to stalk me… 22