tools/mariadb_query_io.py: new tool #5108
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MaxKellermann
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brendangregg,
goldshtn and
davemarchevsky
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I developed this script while analyzing a scalability problem in MariaDB. It turned about that MariaDB had a lot of contention on the global "dict_sys.latch" lock which caused all queries to become extremely slow. This tool does not depend on userspace tracepoints, and can therefore be used on MariaDB without recompiling. I tested it on MariaDB 10.11.6 (Debian Bookworm).
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I developed this script while analyzing a scalability problem in MariaDB. It turned about that MariaDB had a lot of contention on the global "dict_sys.latch" lock which caused all queries to become extremely slow.
This tool does not depend on userspace tracepoints, and can therefore be used on MariaDB without recompiling. I tested it on MariaDB 10.11.6 (Debian Bookworm).