How Database Indexes Actually Speed Up Queries

How Database Indexes Actually Speed Up Queries

Update: 2026-10-11
Share

Description

Most engineers treat database indexes as magic bullets, but they often create more problems than they solve. In this episode, we look at how the B-tree index structure works under the hood, using a specific case of a logistics company that slowed down by adding too many indexes. We explore the trade-off between read speed and write latency, showing why your database might be choking on simple updates because of unused or redundant indexing strategies.


#DatabaseEngineering #IndexOptimization #BTreeStructure #WriteLatency #ReadPerformance #DataStorage #SQLPerformance #NoSQLAlternatives #TechStrategy #LucasAndLuna #FexingoBusiness #BusinessPodcast #TechIndustry #SoftwareArchitecture #QueryPlanning #DataManagement #EngineeringEfficiency #CloudComputing


Keep every episode free: buymeacoffee.com/fexingo

Comments 
loading
00:00
00:00
x

0.5x

0.8x

1.0x

1.25x

1.5x

2.0x

3.0x

Sleep Timer

Off

End of Episode

5 Minutes

10 Minutes

15 Minutes

30 Minutes

45 Minutes

60 Minutes

120 Minutes

How Database Indexes Actually Speed Up Queries

How Database Indexes Actually Speed Up Queries

Fexingo