We have a cluster that is running out of heap during indexing. Our older 
cluster does not have this problem. Both clusters have 8 shards and 3 replica 
sets, for a total of 24 hosts. Both use the same G1GC settings. Both have the 
same indexing feed of 57 million documents.

Old cluster:
Solr 6.6.2
11 GB heap
Oracle Corporation OpenJDK 64-Bit Server VM 1.8.0_131 25.131-b11

New cluster:
Solr 8.7.0
16 GB heap
Amazon.com Inc. OpenJDK 64-Bit Server VM 11.0.10 11.0.10+9-LTS

Cache sizes on the new cluster are pretty standard, filter and query result 
caches are 512, document cache is 2048. Documents aren’t huge, maybe average 
size a few kbytes. They are homework problems.

Any ideas? The 6.6.2 cluster has been running for a few years with no indexing 
problems.

wunder
Walter Underwood
wun...@wunderwood.org
http://observer.wunderwood.org/  (my blog)

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