PostgreSQL transaction handling with JSONB fields and unexpected lock wait timeout
I'm working with a frustrating scenario with PostgreSQL 13 when trying to handle transactions that involve updating a JSONB field. I'm performing a series of operations inside a transaction block to ensure data integrity, but I consistently receive the behavior `behavior: deadlock detected` or `behavior: lock wait timeout exceeded; try restarting transaction`. Here’s a simplified version of what I’m trying to do: ```sql BEGIN; UPDATE my_table SET json_data = jsonb_set(json_data, '{key}', '"new_value"') WHERE id = 1; -- some other operations that might involve the same table COMMIT; ``` The question arises when I attempt to update the JSONB field while simultaneously reading from the same table in another transaction. I have another process that runs an update on the same table after a short delay, which eventually leads to the deadlock. I’ve tried using `SELECT FOR UPDATE` on the rows I want to modify, but this hasn’t resolved the locking scenario. Also, I’ve checked the isolation level and set it to `SERIALIZABLE`, but it didn't help either. Another approach I considered was to perform these updates sequentially to avoid the deadlocks altogether, but that could lead to performance bottlenecks. I’m wondering if there’s a better way to handle this situation. Has anyone experienced similar issues with JSONB updates and deadlocks in PostgreSQL? What strategies can I employ to mitigate these locking issues while maintaining the integrity of the transactions? Any insights or code samples would be appreciated!