All Postgres Locks Explained | A Deep Dive
Mar 19, 2023•49 min
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Episode description
Get my database engineering course https://database.husseinnasser.com
In this video I do a deep dive in all locks obtained by postgres, I learned a lot while making this video and hope you enjoy it.
0:00 Intro
2:30 What are Locks?
5:30 Overview of Postgres Locks
9:10 Table-Level Locks
11:40 ACCESS EXCLUSIVE
17:40 ACCESS SHARE
19:00 ROW SHARE
20:15 ROW EXCLUSIVE
21:15 SHARE UPDATE EXCLUSIVE
23:30 SHARE
24:50 SHARE ROW EXCLUSIVE
25:18 EXCLUSIVE
25:30 Table Lock Conflict Matrix
28:30 Row-Level Locks
30:00 FOR UPDATE
33:00 FOR NO KEY UPDATE
34:00 FOR SHARE
34:40 FOR KEY SHARE
35:10 Row Lock Conflict Matrix
39:25 Page-Level Locks
42:00 Deadlocks
46:00 Advistory Locks
47:20 Summary
https://www.postgresql.org/docs/current/explicit-locking.html
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