SQL Server compression methods testing and comparison Posted on April 10, 2025, updated on April 10, 2025 by Yannick JaquierTable of contents Preamble SQL Server compression test case SQL Server compression testing sp_estimate_data_compression_savings Row compression Page compression COMPRESS/DECOMPRESS compression Columnstore compression Columnstore archive compression SQL Server compression wrap up References Continue reading
SYS schema hands-on Posted on December 10, 2024, updated on December 10, 2024 by Yannick JaquierTable of contents Preamble SYS schema configuration Instances global waits SYS schema schema view SYS schema side procedures sys.diagnostics() sys.statement_performance_analyzer() sys.format_time() and sys.format_bytes() References Continue reading
Information schema hands-on Posted on November 20, 2024, updated on November 20, 2024 by Yannick JaquierTable of contents Preamble Information Schema configuration Information Schema global status queries Aborted clients All clients traffic Comparison of on-disk and memory temporary tables Com_xxx and Handler_xxx variables InnoDB free and dirty space and data read and written InnoDB log buffer write rate Query cache statistics Tables joins performance Information Schema InnoDB queries InnoDB buffer pool statistics InnoDB locks InnoDB metrics Information Schema remaining tables Processlist Routines Users and Schemas privileges System variables References Continue reading
Performance schema hands-on – part 2 Posted on October 30, 2024, updated on December 6, 2024 by Yannick JaquierTable of contents Preamble Performance Schema with global and digest instrumentation Performance Schema with global, thread and current event instrumentation Performance Schema with global, thread and event history instrumentation Performance Schema impact References Continue reading
Performance schema hands-on – part 1 Posted on October 10, 2024, updated on December 6, 2024 by Yannick JaquierTable of contents Preamble Performance schema activation and configuration Performance Schema with global instrumentation Only Performance Schema with global and thread instrumentation References Continue reading
innodb_io_capacity and innodb_io_capacity_max tuning Posted on September 20, 2024, updated on September 20, 2024 by Yannick JaquierTable of contents Preamble Fio Buffered I/O Non buffered I/O Iostat Sysbench innodb_io_capacity and innodb_io_capacity_max Huge Pages References Continue reading