SSM is a fork of PMM 1.x with additional features, updates and fixes. Notable new features in the initial release include QAN query harvesting via slow log in RDS, manual node cleanup functionality, and ARM64 builds.
If you spend all day every day looking after hundreds of MySQL servers, the chances are that you have encountered this problem. And the chances are that if your servers are configured properly (i.e. you have the same configuration on the master and the slaves), the error is almost certainly spurious and doesn’t mean what […]
A summary of basics of MariaDB and MySQL performance tuning, along with a few more advanced hints and tips. Beyond these, further tuning becomes very workload specific.
When you DROP or TRUNCATE a table or partition in MySQL and you have a large buffer pool, you may noticed a complete server lock-up or stall of multiple seconds. Mitigation and Workarounds.
https://shatteredsilicon.net/wp-content/uploads/2020/09/ssl.jpg500500Gordan Bobichttps://shatteredsilicon.net/wp-content/uploads/2021/06/Shattered-Silicon-Logo-Landscape-300x37.pngGordan Bobic2021-11-27 11:42:092022-05-12 16:11:45MariaDB and MySQL DROP / TRUNCATE Lock / Stall Bug, Mitigations and Workarounds
https://shatteredsilicon.net/wp-content/uploads/2020/09/ssl.jpg500500Jonathan Levinhttps://shatteredsilicon.net/wp-content/uploads/2021/06/Shattered-Silicon-Logo-Landscape-300x37.pngJonathan Levin2021-07-12 08:38:462021-07-12 08:40:45MariaDB / MySQL Performance Tuning and Optimization: How to Delete Faster on MySQL
https://shatteredsilicon.net/wp-content/uploads/2020/09/ssl.jpg500500Gordan Bobichttps://shatteredsilicon.net/wp-content/uploads/2021/06/Shattered-Silicon-Logo-Landscape-300x37.pngGordan Bobic2021-07-11 12:19:522023-03-20 15:48:38MariaDB / MySQL Performance Tuning and Optimization: Data Types
Most DBAs know that sub-selects are typically bad for performance, but this example we encountered in the wild illustrates very well just how bad for performance sub-selects can be.
https://shatteredsilicon.net/wp-content/uploads/2020/09/ssl.jpg500500Gordan Bobichttps://shatteredsilicon.net/wp-content/uploads/2021/06/Shattered-Silicon-Logo-Landscape-300x37.pngGordan Bobic2021-06-24 17:02:212021-12-21 07:29:22MariaDB / MySQL Performance Tuning and Optimization: Sub-SELECTs are Evil
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MariaDB / MySQL Performance Tuning
by Charlotte RuddickMariaDB and MySQL performance tuning, theory and primer.
SSM – PMM 1.x Fork with Additional Features
by Gordan BobicSSM is a fork of PMM 1.x with additional features, updates and fixes. Notable new features in the initial release include QAN query harvesting via slow log in RDS, manual node cleanup functionality, and ARM64 builds.
MySQL / MariaDB: Waiting for table flush
by Gordan BobicTroubleshooting performance degradation caused by pileup of queries stuck in “Waiting for table flush” state in MySQL and MariaDB.
MySQL / MariaDB: Waiting for query cache lock
by Gordan BobicTroubleshooting performance degradation caused by pileup of queries stuck in “Waiting for query cache lock” state in MySQL and MariaDB.
MySQL – Fixing: Got fatal error 1236 from master when reading data from binary log: log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master;
by Gordan BobicIf you spend all day every day looking after hundreds of MySQL servers, the chances are that you have encountered this problem. And the chances are that if your servers are configured properly (i.e. you have the same configuration on the master and the slaves), the error is almost certainly spurious and doesn’t mean what […]
MariaDB Performance Tuning and MySQL Performance Tuning
by Aaron StapleA summary of basics of MariaDB and MySQL performance tuning, along with a few more advanced hints and tips. Beyond these, further tuning becomes very workload specific.
MariaDB and MySQL DROP / TRUNCATE Lock / Stall Bug, Mitigations and Workarounds
by Gordan BobicWhen you DROP or TRUNCATE a table or partition in MySQL and you have a large buffer pool, you may noticed a complete server lock-up or stall of multiple seconds. Mitigation and Workarounds.
MariaDB / MySQL Performance Tuning and Optimization: How to Delete Faster on MySQL
by Jonathan LevinDELETE statements can have a disproportionately high impact on performance of a database server. Here we explore techniques for optimizing them.
MariaDB / MySQL Performance Tuning and Optimization: Data Types
by Gordan BobicData types matching between the table columns and queries is important – mismatch usually prevents the use of indexes.
MariaDB / MySQL Performance Tuning and Optimization: Sub-SELECTs are Evil
by Gordan BobicMost DBAs know that sub-selects are typically bad for performance, but this example we encountered in the wild illustrates very well just how bad for performance sub-selects can be.