How does the Empty all services data action work?¶
In order to preserve global performance, this action won’t remove all data from the database right after you launched it. Entries will be removed from index_data and metrics tables but not from data_bin.
The main reason for that is data_bin quickly stores a huge amount of data and uses the MyISAM engine which doesn’t support per-row locking. If you try to remove too many entries simultaneously, you could block all your database for several hours.
Anyway, it doesn’t mean the data will stay into your database indefinitely. It will be removed in the future, depending on you data retention policy.
My dashboard on several days is undetermined, what should I look into?¶
This is a bug from some mysql versions with partitioned tables (https://bugs.mysql.com/bug.php?id=70588). Replacing ‘=’ by LIKE in queries fixes the problem but reduces performance.
We therefore recommend to update your SGBD : MySQL 5.5.36, 5.6.16, 5.7.4, MariaDB 10.0.33, 10.1.29, 10.2.10.
No graph seems to be generated, what should I look into?¶
There are various things to check when RRDs don’t seem to be generated.
By default, the graph files (.rrd) are stored in /var/lib/centreon/metrics, it is obviously necessary to have enough space in your filesystem.
Can the .rrd files be written in the /var/lib/centreon/metrics directory? Process that usually writes in this directory is either centstorage or cbd.
Does your plugin return the correct output? Refer to the Plugin API documentation for more information
Centreon Broker must be configured properly, refer to this documentation for more information.
The cbd rrd daemon must be running:
$ /etc/init.d/cbd status * cbd_central-rrd is running
Make sure to have the Start script for broker daemon parameter filled in Administration > Options > Monitoring.