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From Alexey Kukushkin <kukushkinale...@gmail.com>
Subject Re: Is WAL a memory-mapped file?
Date Wed, 01 Nov 2017 19:19:36 GMT

The default mode is the slowest of the 3 WAL write modes available. The
other two are OS buffered write "LOG_ONLY" and Ignite buffered write

You might need some benchmarking in your real environment (hardware and
software) with your specific task to understand if it is "slow". Often you
can significantly speed the things up with native persistence performance
tuning like adjusting page size, using separate disk for WAL, SSD
over-provisioning, etc. Please read about some tricks here

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