PostgreSQL 13 will use kqueue on systems that support it (*BSD, macOS). https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=815c2f0972 …
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Replying to @MengTangmu
It would be interesting to see some benchmarks with and without kqueue.
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Replying to @fnoyanisi @MengTangmu
See the thread linked from the commit message.
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Replying to @petereisentraut @fnoyanisi
The main goal for now is to fix these workloads that suffered from high system time due to locking in poll() (just like on Linux before we did epoll()): https://www.postgresql.org/message-id/CA%2BhUKGLDfs-tcEYdOG6%2B7cFkGnuWNmVTJxri0MB%3DCE93aQNP_Q%40mail.gmail.com … In future I hope this will also help with sharding (streaming in results from many other servers).
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And perhaps also help as a small building block for an AIO backend for freebsd...
11:46 AM - 5 Feb 2020
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