java - How to optimize solr index

Question

How to optimize solr index. I want to optimize my solr indexing for i try to change in solrconfig.xml it getting indexed but i want to how to verify that they are optimized and with which thing are involve in index optimization.

Answer 1

Check the size of respective core before you start.

Open Terminal 1:

watch -n 10 "du -sh /path to core/data/*"

Open Terminal 2 and Execute:

curl http://hostname:8980/solr/<core>/update?optimize=true

Instead of "core", update your respective name of the core.

You could see the size of the core will increase gradually about double the size of your indexed data and will reduce suddenly. This will take time depends on your solr data.

For instance, 50G indexed data spikes nearly 90G and downs to optimized 25G data. And normally it will take 30-45min for this amount of data.

Why doesn't my index directory get smaller (immediately) when i delete documents? force a merge? optimize?