+mysqld_exporter connects to a MySQL or MariaDB server with a dedicated, minimally-privileged account (`PROCESS, REPLICATION CLIENT, SELECT`) and exposes its metrics — global status and variables, InnoDB engine status, replication/slave status, and optional Performance Schema and `information_schema` collectors — on an HTTP endpoint that Prometheus can scrape. Individual collectors can be toggled on or off with `--collect.*` flags, and it ships with example Grafana dashboards and Prometheus alerting rules.
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