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Configure and access Azure Database for MariaDB slow query logs by using Azure CLI

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Important

Azure Database for MariaDB is on the retirement path. We strongly recommend that you migrate to Azure Database for MySQL. For more information about migrating to Azure Database for MySQL, see What's happening to Azure Database for MariaDB?.

You can download the Azure Database for MariaDB slow query logs by using Azure CLI, the Azure command-line utility.

Prerequisites

To step through this how-to guide, you need:

Configure logging

You can configure the server to access the MySQL slow query log by taking the following steps:

  1. Turn on slow query logging by setting the slow_query_log parameter to ON.
  2. Select where to output the logs to using log_output. To send logs to both local storage and Azure Monitor Diagnostic Logs, select File. To send logs only to Azure Monitor Logs, select None
  3. Adjust other parameters, such as long_query_time and log_slow_admin_statements.

To learn how to set the value of these parameters through Azure CLI, see How to configure server parameters.

For example, the following CLI command turns on the slow query log, sets the long query time to 10 seconds, and then turns off the logging of the slow admin statement. Finally, it lists the configuration options for your review.

az mariadb server configuration set --name slow_query_log --resource-group myresourcegroup --server mydemoserver --value ON
az mariadb server configuration set --name log_output --resource-group myresourcegroup --server mydemoserver --value FILE
az mariadb server configuration set --name long_query_time --resource-group myresourcegroup --server mydemoserver --value 10
az mariadb server configuration set --name log_slow_admin_statements --resource-group myresourcegroup --server mydemoserver --value OFF
az mariadb server configuration list --resource-group myresourcegroup --server mydemoserver

List logs for Azure Database for MariaDB server

If log_output is configured to "File", you can access logs directly from the server's local storage. To list the available slow query log files for your server, run the az mariadb server-logs list command.

You can list the log files for server mydemoserver.mariadb.database.azure.com under the resource group myresourcegroup. Then direct the list of log files to a text file called log_files_list.txt.

az mariadb server-logs list --resource-group myresourcegroup --server mydemoserver > log_files_list.txt

Download logs from the server

If log_output is configured to "File", you can download individual log files from your server with the az mariadb server-logs download command.

Use the following example to download the specific log file for the server mydemoserver.mariadb.database.azure.com under the resource group myresourcegroup to your local environment.

az mariadb server-logs download --name mysql-slow-mydemoserver-2018110800.log --resource-group myresourcegroup --server mydemoserver

Next steps