Hi,
Firstly, thank you for detailed blogs that I have personally followed but
naturally with some delay. Personally, I have not yet tested latest MySQL
5.7 performance using punch hole. My testing have been done mainly using
MariaDB and NVMFS in FusionIO NVM devices. MariaDB 10.1 does not use by
d
InnoDB punch-hole compression is very bad for a filesystem when done on
every (or most) page writes. That feature was not designed to be used in
that manner and generates far too much in-memory metadata in the
filesystem. If nothing else it leads to multi-minute unlink() system calls.
Yet both Mari
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