Monitoring MySQL/MariaDB dengan Grafana Dashboard

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Referensi

1. Monitoring MySQL / MariaDB with Prometheus in five minutes, https://computingforgeeks.com/monitoring-mysql-mariadb-with-prometheus-in-five-minutes/
   
2. mysqld_exporter, https://github.com/prometheus/mysqld_exporter 
3. MySQL Overview,  Dashboard from Percona Monitoring and Management project, https://grafana.com/grafana/dashboards/7362
4.  Node-exporter setup with Systemd, https://jaanhio.me/blog/linux-node-exporter-setup/
5.  Node Exporter Full, https://grafana.com/grafana/dashboards/1860
   

innotop : A realtime terminal-based top-like monitor for MySQL

Setelah install, Grant user yang ingin digunakan untuk monitoring

GRANT SUPER, REPLICATION CLIENT  ON *.* TO username@'localhost';

Referensi

1. innotop, https://github.com/innotop/innotop

Melihat dan Mengubah Engine Tabel-Tabel di Database dengan CLI

Melihat engine yang digunakan pada setiap tabel di sebuah database : 

SELECT TABLE_NAME,
ENGINE
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = 'dbname';

 Mengubah Engine :

ALTER TABLE tbl_name ENGINE=InnoDB;

 Jika mengalami error seperti https://gist.github.com/wildanm/c082ac468a6b9056ceeec5b0c2058c11

Coba naikkan nilai : 

net_read_timeout dan net_write_timeout

Tuning MySQL dengan MySQLTuner-perl

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Referensi

1. MySQLTuner-perl, https://github.com/major/MySQLTuner-perl
2. MySQL Calculator, http://www.mysqlcalculator.com/
3. MySQL 5.7 Performance Tuning After Installation, https://www.percona.com/blog/2016/10/12/mysql-5-7-performance-tuning-immediately-after-installation/
4. MySQL Slow Log Analyzer, https://github.com/CherryCircle/MySQLSlowLogAnalyzer
5. Identify Slow Queries, https://docs.pingcap.com/tidb/v3.0/identify-slow-queries
6. Slow Query Log Overview, https://mariadb.com/kb/en/slow-query-log-overview/
7. Configuring the max_connections setting in MySQL, https://dba.stackexchange.com/questions/233886/configuring-the-max-connections-setting-in-mysql
8. How large should be mysql innodb_buffer_pool_size?, https://dba.stackexchange.com/questions/27328/how-large-should-be-mysql-innodb-buffer-pool-size

The total number of locks exceeds the lock table size

Jika  menemukan error seperti ini, yang bisa kita lakukan adalah memperbesar ukuran innodb_buffer_pool_size , maksimalkan sesuai dengan kemampuan mesin kita. 

Jika sudah, dan masih terjadi error yang sama, maka bisa dicoba cara berikut : 

SET @@AUTOCOMMIT=0;

SQL statements disini ….

UNLOCK TABLES;

Bersahabat dengan MySQLWorkbench

Referensi

1. Exclude MySQL Workbench from dark theme with mojave Mac dark theme, https://gist.github.com/AmreeshTyagi/29220b3d55c21cf3664efa7352c0ee6e

Menghitung Weighted average di MySQL

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Referensi

1. Weighted average calculation in MySQL?, https://stackoverflow.com/questions/3887063/weighted-average-calculation-in-mysql