Marc-André Bombeck 93b6c086b4 fix(restore): let a large restore outlast the request statement timeout ...

A restore of an account with 1.9 million readings, most of them deleted
by the nightly consolidation and still awaiting the purge, was cancelled
in its clearing step: `DELETE FROM measurements` ran past the 60 s
statement timeout every pooled connection carries, and the whole restore
rolled back with a message that named no cause (#1031).

Most of that statement was not the delete. Two columns point into
`measurements` with ON DELETE SET NULL and had no index, so Postgres
scanned `personal_records` and `ecg_recordings` once per deleted reading:
38 of 40 s on a seeded account with 300 personal records. Migration 0362
indexes both, which also speeds up the tombstone purge and account
deletion.

The restore transaction now sets its own statement and idle-in-transaction
limits to the transaction budget with SET LOCAL, and the budget counts
the rows the account holds as well as the rows the file carries. A
rolled-back restore names what the database refused it over (timeout,
lock, constraint, storage, connection, other) on the job row, the
console, the audit row and the wide event.

2026-09-27 11:24:41 +02:00

2.6 MiB

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