Kenapa Koneksi PostgreSQL Itu Mahal?
Berawal dari satu bug yang bikin pusing: di halaman create, INSERT sukses, data ke-return lengkap sama id-nya, tapi pas dibuka halaman detail datanya nggak ada. Dicek ke database memang nggak ada. Dan intermittent — kadang masuk, kadang nggak. Nggak ada error, nggak ada exception, kodenya udah bener. Kira-kira datanya ke mana?Di sharing session ini kita bedah dari akarnya: kenapa satu koneksi PostgreSQL itu "mahal", apakah ini cuma masalah Postgres atau database lain juga, jebakan yang muncul pas aplikasi di-scale-out (autoscaling), cara kerja PgBouncer sebagai connection pooler, sampai akhirnya bug intermittent di awal tadi terjawab tuntas.
Yang dibahas:
• Process-per-connection: kenapa 1 koneksi = 1 proses OS + beberapa MB RAM
• Perbandingan model koneksi: PostgreSQL vs MySQL vs MongoDB vs Cassandra vs Redis vs DynamoDB
• Kenapa autoscaling bisa bikin "too many connections" pas trafik tinggi
• Cara PgBouncer memisahkan penskalaan aplikasi dari jumlah koneksi database
• Tiga mode pooling: session, transaction, statement
• Harga dari transaction mode: prepared statement, temp table, SET, advisory lock
• Fix satu baris untuk bug prepared statement: prepare: false
• PgBouncer vs Supavisor (pooler-nya Supabase)
• Checklist praktis milih jenis koneksi
Demo project (Bun + postgres.js + PgBouncer, lengkap 6 kasus yang bisa dijalankan sendiri):
https://github.com/ProgrammerZamanNow/postgresql-connection-demo
==========================
TIMELINE
==========================
00:00 Pendahuluan
00:25 Berawal dari satu bug
02:32 Agenda
03:37 Kenapa satu koneksi PostgreSQL itu mahal
05:37 Ini cuma masalah PostgreSQL?
10:32 Jebakan pas aplikasi scale-out
14:28 Solusinya: PgBouncer
22:28 Ada harganya
39:32 Ringkasan praktis
==========================
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