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odoo_source/addons/bus/tests
Victor Piryns (pivi) 6101700868 [FIX] bus: split large NOTIFY payloads
Description:
On a database with heavy activity, it is possible for the payload
size we pass for the `NOTIFY` query on the bus to be larger than what
PostgreSQL allows by default, 8000 B. This limit is defined as:
https://github.com/postgres/postgres/blob/6686e9676c8faff4ee04c1574e117ae38f117efa/src/backend/commands/async.c#L158-L166
and it is used to compare the size of the payload before processing:
https://github.com/postgres/postgres/blob/6686e9676c8faff4ee04c1574e117ae38f117efa/src/backend/commands/async.c#L654-L657

Fix:
- Binary split the payload into multiple chunks if it's exceeding
  the above-mentioned limit. The unit of splitting is a channel, so
  if the content of one channel itself is larger than said limit, it
  is not handled, but shouldn't occur under normal circumstances.
- Introduce also a new ENV variable `ODOO_NOTIFY_PAYLOAD_MAX_LENGTH`
  to allow tweaking of the limit if they are running a handrolled
  custom PostgreSQL cluster.

Reference:
opw-3650618

closes odoo/odoo#159469

X-original-commit: 61c7bba44990522d853bae25aa7899cb03c72e31
Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com>
Signed-off-by: Piryns Victor (pivi) <pivi@odoo.com>
2024-03-27 17:45:00 +00:00
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