Elasticsearch: Difference between revisions
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=Links= | =Links= | ||
=Documentation= | |||
==Configuration== | |||
*http://jprante.github.io/2012/11/28/Elasticsearch-Java-Virtual-Machine-settings-explained.html | *http://jprante.github.io/2012/11/28/Elasticsearch-Java-Virtual-Machine-settings-explained.html | ||
==Heap== | |||
*https://www.elastic.co/blog/a-heap-of-trouble | *https://www.elastic.co/blog/a-heap-of-trouble | ||
==Garbage collection== | |||
*[https://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/geninfo/diagnos/garbage_collect.html Garbage collect] | |||
*[https://sematext.com/blog/java-garbage-collection/#how-does-java-garbage-collection-work Garbage collection] | |||
=Monitoring elasticsearch= | =Monitoring elasticsearch= | ||
== Things to monitor == | |||
=== heap size === | |||
*node jvm.mem.heap_used_percent | |||
=== garbage collection === | |||
Something like | |||
node.jvm.uptime_in_millis/node.jvm.gc.collectors.young.collection_count | |||
*[https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/ How to monitor Elasticsearch performance] | *[https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/ How to monitor Elasticsearch performance] | ||
*[https://sematext.com/blog/top-10-elasticsearch-metrics-to-watch/ Top 10 Elasticsearch Metrics to Monitor] | *[https://sematext.com/blog/top-10-elasticsearch-metrics-to-watch/ Top 10 Elasticsearch Metrics to Monitor] | ||
*[https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/#key-elasticsearch-performance-metrics-to-monitor Performance metrics to monitor] | *[https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/#key-elasticsearch-performance-metrics-to-monitor Performance metrics to monitor] | ||
*[https://opster.com/guides/elasticsearch/capacity-planning/elasticsearch-heap-size-usage/ Heap Size Usage] | *[https://opster.com/guides/elasticsearch/capacity-planning/elasticsearch-heap-size-usage/ Heap Size Usage] | ||
==Query the web interface== | |||
*'cluster': 'http://localhost:9200/_cluster/stats', | |||
* 'nodes' : 'http://localhost:9200/_nodes/stats', | |||
* 'indices': 'http://localhost:9200/_stats', | |||
* 'health' : 'http://localhost:9200/_cluster/health' | |||
=Installing Elasticsearch= | =Installing Elasticsearch= | ||
==On Debian== | ==On Debian== | ||
deb https://artifacts.elastic.co/packages/oss-6.x/apt stable main | deb https://artifacts.elastic.co/packages/oss-6.x/apt stable main | ||
packages is called elasticsearch-oss now? | |||
=Terminology= | =Terminology= | ||
| Line 18: | Line 44: | ||
==Percolation== | ==Percolation== | ||
https://spinscale.de/posts/2021-09-15-understanding-elasticsearch-percolate-query.html | https://spinscale.de/posts/2021-09-15-understanding-elasticsearch-percolate-query.html | ||
=FAQ= | |||
==Status is yellow== | |||
*[http://chrissimpson.co.uk/elasticsearch-yellow-cluster-status-explained.html Yellow cluster status explained] | |||
and look for [https://www.datadoghq.com/blog/elasticsearch-unassigned-shards/ unassigned shards] | |||
Latest revision as of 15:53, 20 February 2023
Links
Documentation
Configuration
Heap
Garbage collection
Monitoring elasticsearch
Things to monitor
heap size
- node jvm.mem.heap_used_percent
garbage collection
Something like
node.jvm.uptime_in_millis/node.jvm.gc.collectors.young.collection_count
- How to monitor Elasticsearch performance
- Top 10 Elasticsearch Metrics to Monitor
- Performance metrics to monitor
- Heap Size Usage
Query the web interface
- 'cluster': 'http://localhost:9200/_cluster/stats',
- 'nodes' : 'http://localhost:9200/_nodes/stats',
- 'indices': 'http://localhost:9200/_stats',
- 'health' : 'http://localhost:9200/_cluster/health'
Installing Elasticsearch
On Debian
deb https://artifacts.elastic.co/packages/oss-6.x/apt stable main
packages is called elasticsearch-oss now?
Terminology
shards
"blocks" of index data distributed over the nodes
Percolation
https://spinscale.de/posts/2021-09-15-understanding-elasticsearch-percolate-query.html
FAQ
Status is yellow
and look for unassigned shards
