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does writer process also write data to WAL log files ? - Mailing list pgsql-general

From Thomas
Subject does writer process also write data to WAL log files ?
Date
Msg-id 2335fa47-8fd1-46ad-b82f-c83842a5d158@z1g2000prc.googlegroups.com
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I found not only WAL writer process write data to WAL log files ,but
also write process which I thought only write dirty buffer to data
file .

Could some body tell me the reason?Tks a lot !!

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