Hi all,

I recently had an issue with very high cpu usage on our Testing SolrCloud 
cluster when sending data to Solr, I've tried several which reduced the usage 
of CPU, now our testing SolrCloud is under an 8 core machine with 32 gb de RAM 
(recently changed the heap to 21g as a test).
When we push data to solr, it takes a couple of minutes for that document to be 
available on search results, I've tried everything and cannot find out what is 
going on, it was working perfectly fine until last week when it suddenly 
started having this delay.

Our configuration for NRT is very aggressive, 60s of auto commit with open 
searcher false and 1s for auto soft commit, but it doesn't matter what 
configuration I try, it will always take a couple of minutes to have the new 
document available on search results.

I've tried modifying the cache configuration to use Caffeine, tried removing 
max warming searchers values, tried modifying autoWarmCount to different values 
and even tried, and still the same issue, it's almost like my configuration 
doesn't matter.

We are using a Solr 8.11 install in SolrCloud mode, 2 nodes, 1 Zookeeper node. 
On each node we have 6 collections of around 10-11M records each (numbers 
didn't change much before and after this issue started). The total amount of 
disk spaced used is 20.4gb, our heap is now 21gb.

I'm kind of desperate since I'll be on vacation starting the end of next week 
and I haven't been able to find out what is wrong with this, my fear is if this 
happens to our production server, we won't be able to know how to fix it other 
than reinstalling Solr from scratch.

Our prod server only has 1 collection of 11gb and is under a 4 core servers 
with 16 gb of ram (8gb heap setup).

Any help or pointer will be highly appreciated as I'm desperate.

Thanks in advance!

Matias Laino | DIRECTOR OF PASSARE REMOTE DEVELOPMENT
matias.la...@passare.com<mailto:matias.la...@passare.com> | +54 11-6357-2143
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