Tag - systemd

AMD EPYC Performance Testing… or Don’t get on the wrong side of SystemD

Ubuntu 16 AMD EPYC

Ever since AMD released their EPYC CPU for servers I wanted to test it, but I did not have the opportunity until recently, when Packet.net started offering bare metal servers for a reasonable price. So I started a couple of instances to test Percona Server for MySQL under this CPU. In this benchmark, I discovered […]

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A Mystery with MySQL open_files_limit

MySQL open_files_limit

In this blog, we’ll look at a mystery around setting the MySQL open_file_limit variable in MySQL and Percona Server for MySQL.
MySQL Server needs file descriptors to run. It uses them to open new connections, store tables in the cache, create temporary tables to resolve complicated queries and access persistent ones. If mysqld is not […]

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Percona Toolkit and systemd

After some recent work with systemd I’ve realized it’s power and I can come clean that I am a fan. I realize that there are multitudes of posts out there with arguments both for and against systemd but let’s look at some nice ways to have systemd provide us with (but not limited to) pt-kill-as-a-service.
This brief […]

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