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cold-import 在 swap thrashing 大压力下,单 fact-write 事务可能跑 20s+,
默认 5s timeout abort 整条 patient pipeline。服务器全量 cold-import 跑到
15% (479k/3.15M txn) 就被 "Transaction already closed" 杀死。
4 处 $transaction 加 { maxWait:30000, timeout:60000 }:
fact-writer (最热,每 fact 1 次)
persona recompute / plan execution / plan engine 上版
风险:长事务期间持锁久,但 cold-import 本身就是串行 patient,无锁竞争。
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