Just to give some feedback on this thread:
After upgrading from Ubuntu 18.04 to Ubuntu 20.04 our 80 node Solr
8.11.2 / Java 11 cluster became less stable, with shards regularly
switching into down or recovering state, and with manual intervention
sometimes needed (restart of Solr instances to recover).
We switched from G1GC to ZGC 10 days ago, after the discussion in this
thread, and since then we have only had two or three times where shards
have gone into down or recovering state, and we haven't had to intervene
manually.
So far the - I guess - lower latency of ZGC has been beneficial in our
setup.
Best regards,
Adam
--
"Lovely day for a stroll, eh Hobbes? Adam Sjøgren
I certainly enjoy my afternoon constitutional!" a...@koldfront.dk
"Yes, it's quite invigorating!"
