Alex Vandiver 570ff08fde topic: Set a max batch_size on bulk_upate call. ...

The number of affected objects may be quite high, and they are
selected by `id IN (...)` query, and updated with a giant `CASE`.
This turns out to be quadratic, and can cause large queries to take
hours, in a state where they cannot be terminated, when PostgreSQL >11
tries to JIT the query.

Set a batch_size as a stopgap performance fix before moving to
`.update()` as a real fix.

2023-08-14 13:33:20 -07:00

9.7 KiB

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