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  • Ansible
  • Create new MySQL database with predefined collation and encoding
  • Ansible – install Prometheus mysql-exporter on remote instance
  • Install latest MySQL 5.7 on remote instance using ansible
  • Backup + Restoration
  • Bash script – restore non-replica from data files backuped with Percona XtraBackup
  • Bash script: create backup with Percona XtraBackup
  • Clone database with Percona xtrabackup
  • Data manipulations
  • Load data from text file – using command LOAD DATA INFILE
  • Database design
  • How to change data type of column used in foreign key
  • Tiny fun with TINYINT data type
  • Partitioning
  • String types
  • Global Status
  • Global status – table open cache
  • Global status – tmp tables
  • information_schema
  • get comma separated list of columns for table
  • Show all constraints
  • Locks
  • Investigation of locks on MySQL tables
  • Locking strategies
  • mySQL on Linux
  • How to install MySQL 5.7 on Debian 9
  • Linux bash script for drop of all tables
  • Performance
  • MySQL 5.7 parameter range_optimizer_max_mem_size
  • Move MySQL data files / log files / temp directory to the different disk on Ubuntu / Debian
  • Linux hugepages and MySQL – Ubuntu / Debian
  • Experiences with high availability in MySQL cluster
  • InnoDB buffer pool
  • Query cache
  • Configuration parameters for Optimizer
  • Optimizer hints
  • Cost based optimizer / server statistics
  • Replication
  • Settings for parallel replication workers
  • Relay log read failure: Could not parse relay log event entry – binary log is corrupted
  • Setting MySQL chain replication
  • How to handle heavy changes in MySQL replication with ansible
  • Error ‘You cannot ‘ALTER’ a log table if logging is enabled’ on query. Default database: ‘mysql’. Query: ‘ALTER TABLE slow_log
  • Switch the binlog format at runtime
  • MySQL replication troubleshooting – replication error on replica
  • Experiences with tuning of MySQL 5.7 replicas
  • Create new replica by copying data and log files on OS level
  • MySQL 5.7 investigate replication lags
  • How to create new MySQL master database
  • Clone new MySQL replica on Google Compute Engine
  • How to manually set MySQL replication
  • MySQL replication troubleshooting – Lags on replicas
  • MySQL replication small cheat sheet
  • Settings
  • MySQL memory usage / settings
  • Useful settings
  • mySQL and more CPUs
  • Memory settings
  • Storage engines
  • FEDERATED engine – small notes
  • Memory
  • MyISAM
  • InnoDB
  • Transactions
  • InnoDB REDO log
  • Binary log
  • Rollback / Undo segment
  • Isolation Levels
  • Multiversion Concurrency Control
  • Transactions
  • Troubleshooting
  • How to clean or resize the ibtmp1 file in MySQL
  • Check MySQL slow log from command line
  • How to handle errcode 28 – no space left
  • What can happen when you try to use very big VARCHAR columns
  • Message “Could not increase number of max_open_files” in MySQL error log
  • Problems with remote login into MySQL caused by performance_schema tables
  • Gotchas in MySQL replication
  • Table corruption / table fragmentation
  • Full disk !
  • Useful small hints
  • Export and import existing users
  • Find size o MySQL database
  • Allow remote access to mysql database
  • kill process / session on database
  • Usefull scripts
  • Check size of tables and indexes for all storage engines
  • Dump from one machine using ssh and restore on other machine
  • Check differences in settings between master and replicas – golang program

Recent Posts

  • How to install MySQL 5.7 on Debian 9
  • Investigation of locks on MySQL tables
  • Settings for parallel replication workers
  • How to clean or resize the ibtmp1 file in MySQL
  • Check MySQL slow log from command line
  • Relay log read failure: Could not parse relay log event entry – binary log is corrupted
  • How to change data type of column used in foreign key
  • Tiny fun with TINYINT data type
  • How to handle errcode 28 – no space left
  • What can happen when you try to use very big VARCHAR columns
  • Message “Could not increase number of max_open_files” in MySQL error log
  • MySQL 5.7 parameter range_optimizer_max_mem_size
  • Setting MySQL chain replication
  • MySQL memory usage / settings
  • Problems with remote login into MySQL caused by performance_schema tables
  • How to handle heavy changes in MySQL replication with ansible
  • Error ‘You cannot ‘ALTER’ a log table if logging is enabled’ on query. Default database: ‘mysql’. Query: ‘ALTER TABLE slow_log
  • Switch the binlog format at runtime
  • Bash script – restore non-replica from data files backuped with Percona XtraBackup
  • MySQL replication troubleshooting – replication error on replica

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