Re: Excessive PostmasterIsAlive calls slow down WAL redo

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От Alvaro Herrera
Тема Re: Excessive PostmasterIsAlive calls slow down WAL redo
Дата
Msg-id 20180410013107.uj3rvk7epcnlme5l@alvherre.pgsql
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Ответ на Re: Excessive PostmasterIsAlive calls slow down WAL redo  (Andres Freund <andres@anarazel.de>)
Ответы Re: Excessive PostmasterIsAlive calls slow down WAL redo  (Andres Freund <andres@anarazel.de>)
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Andres Freund wrote:

> Another approach, that's simpler to implement, is to simply have a
> second selfpipe, just for WL_POSTMASTER_DEATH.

Would it work to use this second pipe, to which each child writes a byte
that postmaster never reads, and then rely on SIGPIPE when postmaster
dies?  Then we never need to do a syscall.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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