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kvdb/sqlbase: relax bulk migration isolation

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ziggie 2026-07-17 21:57:20 -03:00
parent f02cf4c470
commit 18bbdb5363
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1 changed files with 6 additions and 1 deletions
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7
kvdb/sqlbase/migration_bulk_postgres.go
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@ -88,8 +88,13 @@ func (p *postgresDB) BeginBulk(ctx context.Context) (MigrationBulkKVTx, error) {
return nil, err
}
// A bulk migration can touch millions of rows in a single transaction.
// PostgreSQL retains predicate locks until a serializable transaction
// ends, which can make its predicate lock table consume excessive memory.
// Read committed is sufficient because the migration owns the empty
// destination database while loading it.
tx, err := conn.BeginTx(ctx, &sql.TxOptions{
Isolation: sql.LevelSerializable,
Isolation: sql.LevelReadCommitted,
})
if err != nil {
locker.Unlock()