Re: Streaming Replication patch for CommitFest 2009-09

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От Heikki Linnakangas
Тема Re: Streaming Replication patch for CommitFest 2009-09
Дата
Msg-id 4ABB4CF5.4010908@enterprisedb.com
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Ответ на Re: Streaming Replication patch for CommitFest 2009-09  (Fujii Masao <masao.fujii@gmail.com>)
Ответы Re: Streaming Replication patch for CommitFest 2009-09  (Fujii Masao <masao.fujii@gmail.com>)
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Fujii Masao wrote:
> In the 'replication-orig' branch, walreceiver fsyncs the previous XLOG
> file after receiving new XLOG records before writing them. This would
> increase the backend's waiting time for replication in synchronous case.
> The walreceiver should fsync the XLOG file after sending ACK (if needed)
> before receiving the next XLOG records?

I don't follow. Wareceiver does fsync the file just after writing it ifthe fsync_requested flag was set in the message.
Surelythat would be
 
set in synchronous mode, that's what the flag is for, right?

--  Heikki Linnakangas EnterpriseDB   http://www.enterprisedb.com


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