Solid-State Society

Tag: Elasticsearch

Limit Elasticsearch Memory Use (Heap Size)
Add the following to /etc/elasticsearch/jvm.options.d/custom.options:
```
-Xms2g
-Xmx2g
```
According to official documentation you should avoid adding custom options directly in jvm.options.
June 19, 2019
Disable Elasticsearch for Existing Zammad Installs
Zammad can actually work very well without Elasticsearch for small amount of tickets. Please note, after disabling Elasticsearch, you may see many BackgroundJobSearchIndex errors like this, so use it at your own risk.
```
zammad run rails r "Setting.set('es_url', '')" # set it empty
zammad run rake searchindex:rebuild
systemctl stop elasticsearch
systemctl disable elasticsearch
systemctl mask elasticsearch 
```
Further reading: Set up Elasticsearch – Zammad Docs
November 10, 2018
OpenJDK 64-Bit Server VM warning: XX:ParallelGCThreads=N

Just adding -XX:-AssumeMP to /etc/elasticsearch/jvm.options

November 10, 2018