Hi, I found that even read transaction waits for sync rep when it generates WAL records even if XID is not assigned. For example, imagine the case where SELECT query does a heap clean operation and generates XLOG_HEAP2_CLEAN record. ISTM that such a read transaction doesn't need to wait for sync rep because that's not visible to the client... Can we skip waiting for sync rep if XID is not assigned?
Regards, -- Fujii Masao NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
