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https://issues.apache.org/jira/browse/SOLR-13394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16828937#comment-16828937
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Shalin Shekhar Mangar commented on SOLR-13394:
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[~ichattopadhyaya] - a few comments:
# G1GC is recommended for large heaps. This patch enables G1GC regardless of
the size of the heap.
# The default region size is very large at 16MB. G1GC recommends ~2048 regions
which would make this setting appropriate only for 32GB heaps or more. Can we
remove this explicit setting and let G1 choose the default.
# {{-XX:InitiatingHeapOccupancyPercent=45}} is redundant because the default is
already 45.
# Also if we are going to enable large pages, then adding
{{-XX:+AlwaysPreTouch}} is also a good idea to move the defrag costs to startup.
> Change default GC from CMS to G1
> --------------------------------
>
> Key: SOLR-13394
> URL: https://issues.apache.org/jira/browse/SOLR-13394
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
> Assignee: Ishan Chattopadhyaya
> Priority: Major
> Fix For: 8.1
>
> Attachments: SOLR-13394.patch
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> CMS has been deprecated in new versions of Java
> (http://openjdk.java.net/jeps/291). This issue is to switch Solr default from
> CMS to G1.
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