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https://issues.apache.org/jira/browse/SOLR-16549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17776388#comment-17776388
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Bruno Roustant commented on SOLR-16549:
---------------------------------------
I opened SOLR-17036 and its PR to lazy create VersionBucket in the update log
to free memory.
The idea is to still be able to create up to 65536 bucket, but do not create
them ahead of time. Instead start with a map of buckets, and create
VersionBucket instances lazily.
> Solr core memory usage study
> ----------------------------
>
> Key: SOLR-16549
> URL: https://issues.apache.org/jira/browse/SOLR-16549
> Project: Solr
> Issue Type: Task
> Reporter: Noble Paul
> Priority: Major
>
> This is a ticket to study and compare memory usage of cores
> The study is performed on the 9.1 branch
> a simple tests reveals the following. The conclusion is that on an average a
> Solr Core consumes ~3MB of memory for an empty index
> {{cores heap usage }}
> {{---------------------- }}
> {{0 36,623,632 }}
> {{10 68,259,704 }}
> {{20 96,774,456 }}
> {{70 240,501,176 }}
> {{120 379,437,928 }}
> {{200 602,049,784 }}
> {{300 904,252,536 }}
> {{400 1,181,341,200 }}
> {{500 1,455,186,296 }}
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