@tyranny
Rohan Tiwari
@tyranny
Beyond Code
NepalJoined February 2026
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Rohan Tiwari's blogs
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PostgreSQL TOAST Storage Models
Feb 19 · 4 min read · The main problem TOAST solves is fundamental : postgres pages are of 8kb, and tuple must fit within that page. so what happens if you try to insert 1MB of text field ? Without toast you would get an error: "Row too big". With toast PostgreSQL handles...
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Tuple Layout
Feb 18 · 5 min read · When you insert a new row into a table, postgreSQL creates a tuple, a contiguous chunk of memory bytes that contains both system metadata and your actual data. A tuple starts with a 23 byte header. Every single tuple in every table has this same head...
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