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Elasticsearch in garbage collection hell

After several weeks of intense testing, fixing configuration problems, re-indexing data and experiencing problems when upgrading our Kibana indices, we managed to upgrade our 36 Kibana instances and our Elasticsearch cluster in production from version 5.6.16 to 6.7.1 a couple of weeks ago.

We could not believe it but finally we had over 1.300 indices, 100TB of data, 102 000 000 000 documents and 18 Elasticsearch nodes running the last version of the elastic 6.x series at the moment.

Using Zabbix with PostgreSQL as the database backend

We started using Zabbix to monitor the IT infrastructure at The University of Oslo in 2014. During all this time we have been running all our Zabbix servers on VMware virtual servers with an acceptable level of performance. This situation changed some months ago when the VMvare+Storage we were using did not have more available resources for us to grow and it was slowing down the future development of our monitoring system.

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