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{{tag>graylog troubleshooting logging monitoring}}

====== Graylog troubleshooting ======
===== Messages not processing =====
If there are a lot of messages piling up in Graylog's journal (**System>Nodes>nodename>Disk Journal**> Utilization) but they are not showing in the Search, you will need to delete the journal folder under ///var/lib/graylog-server//. Then restart the graylog.

===== Elasticsearch nodes disk usage above low watermark =====
Configure lower index retention (mygraylog.com/system/indices) to delete the older ones or delete it manually.

====== Tested on ======
  * Graylog 3.3.16
  * Debian 9

====== See also ======
  * [[wiki:elasticsearch_troubleshooting|Elasticsearch troubleshooting]]

====== References ======
  * https://community.graylog.org/t/after-disk-space-issue-no-out-messages-help/1766