Let’s see some metrics that are important for this. Monitoring your database is not only important to see if you are having an issue, but also to know if you need to change something to improve your database performance, that is probably one of the most important things to monitor in a database. You can monitor latency or packet loss, and the main issue could be a network saturation, a hardware issue, or just a bad network configuration. NetworkĪ network issue can affect all the systems as the application can’t connect (or connect losing packages) to the database, so this is an important metric to monitor indeed. A high load average could be generated by an excessive CPU, RAM, or Disk Usage. It is related to the three points mentioned above. Disk UsageĪn abnormal increase in the use of disk space or an excessive disk access consumption are important things to monitor as you could have a high number of errors logged in the log file or a configuration that could generate an important disk access consumption instead of using memory to process the queries. Depending on the database technology, there are different parameters to specify the amount of memory to be used for different database tasks. If you are seeing a high value for this metric and nothing has changed in your system, you probably need to check your database configuration. If the problem is the database process, you will need to check what is happening inside the database. In this case, it is important to identify the process/processes that are generating this issue. CPU UsageĪn excessive percentage of CPU usage could be a problem if it is not usual behavior. One important thing (which is common to all database engines and even to all systems) is to monitor the Operating System behavior. Having a good monitoring and alerting system is important to make this task as simple as possible. Keep in mind that when one of your metrics is affected, it can also affect others, making troubleshooting of the issue more complex. You need to monitor the metric always in the context of your system, and you should look for alterations on the behavior pattern. You will need to define which metrics you are going to monitor from both sides and how you are going to do it. When monitoring systems, there are two main things to take into account: the operating system and the database itself. Now let’s see what you should monitor in this Moodle Database. Another option is to use a Load Balancer, who will send the traffic to the available nodes and it could be able to help on failover tasks. So, it means you can configure slave read-only nodes to balance the read traffic and increase the performance. This is the basic database configuration, but there is also an optional configuration commented out in the same file: 'connecttimeout' => null, $CFG->prefix = 'mdl_' // prefix to use for all table names Pool moodle password#$CFG->dbpass = 'moodlepass' // your database password $CFG->dbuser = 'moodleuser' // your database username $CFG->dbname = 'moodle' // database name, eg moodle $CFG->dblibrary = 'native' // 'native' only at the moment $CFG->dbtype = 'mariadb' // 'pgsql', 'mariadb', 'mysqli', 'sqlsrv' or 'oci' Moodle Database Configurationįirst, let’s take a look at the Moodle Database configuration file: /var/www/html/moodle/config.php: //= In this blog, we will take a look at what you need to manage and monitor in a Moodle Database, and how you can do it easier using ClusterControl. It supports different database technologies (e.g. Moodle is a learning platform designed to provide educators, administrators, and learners with a single robust, secure, and integrated system to create personalized learning environments. This COVID-19 pandemic increased the working and studying from home in an exponential way, so many platforms took an important role in this situation, and probably one of the most important was Moodle. Even in a small project, you want to be sure everything is going fine or if you might need to change something, and there are also different tasks to perform if you want to ensure that your systems will run in a healthy way. No matter what kind of application/system you are running, you will always need to manage and monitor your databases.
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