[Bug 214566] databases/mysql57-server: After version 5.7.12 cannot keep up with replication

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214566

--- Comment #5 from pete at twisted.org.uk ---
Ok, I narrowed this down a lot more. I can now get it to be slow using a port
of 5.7.12.
This version is slow:

svn co svn://svn.freebsd.org/ports/head/databases/mysql57-server -r 415407 slow

This version is OK

svn co
https://svn0.eu.freebsd.org/ports/branches/2016Q2/databases/mysql57-server -r
428416 ok

The slow one is mysql 5.7.12_1 as opposed to 5.7.12 - note they are being
checked out from different branches above. I haven't got very far with this
yet, but from a quick diff it appears that the big change was to start using
openssl from ports instead of base.

All my machines replicate using SSL.

I haven't tried a build using system SSL yet, but as I am looking at the
'seconds behind master' value to see the lag, then it is not that the actual
pulling of the log files is slow. So what else is SSL used for within mysql ?

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