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由 Vadim B. Mikheev 提交于
2. varsup.c:ReadNewTransactionId(): don't read nextXid from disk - this func doesn't allocate next xid, so ShmemVariableCache->nextXid may be used (but GetNewTransactionId() must be called first). 3. vacuum.c: change elog(ERROR, "Child item....") to elog(NOTICE) - this is not ERROR, proper handling is just not implemented, yet. 4. s_lock.c: increase S_MAX_BUSY by 2 times. 5. shmem.c:GetSnapshotData(): have to call ReadNewTransactionId() _after_ SpinAcquire(ShmemIndexLock).
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