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Increase idle_in_transaction timeout for snapshot copy #2884

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Merged
dwwoelfel merged 1 commit into from
Aug 28, 2026
Merged

Increase idle_in_transaction timeout for snapshot copy #2884

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5 changes: 5 additions & 0 deletions server/src/instant/backup.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -651,6 +651,11 @@
slot-name (str "backup_" (.replace (str process-id) "-" "_"))
{:keys [connections lsn before-ts]} (wal/create-consistent-point db-config slot-name 2)
[^PgConnection copy-conn ^PgConnection query-conn*] connections
;; query-conn* holds its snapshot transaction open for the whole backup
;; but only runs a query per app, so it sits idle in transaction while
;; we collect triples. Bump idle_in_transaction_session_timeout to an hour so
;; Postgres doesn't reap it mid-backup (the pooled default is one minute).
_ (sql/select query-conn* ["set idle_in_transaction_session_timeout = 3600000"])
query-conn (snapshot-datasource query-conn*)
isn (instant.isn/->ISN config/invalidator-slot-num lsn)
_ (insert-backup-job! {:id process-id
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