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https://issues.apache.org/jira/browse/PHOENIX-1958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535101#comment-14535101
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James Taylor commented on PHOENIX-1958:
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[~rajeshbabu] - I'll try to put a patch together for this quickly - would be
good if we could get this into 4.4.0.
> Minimize memory allocation on new connection
> --------------------------------------------
>
> Key: PHOENIX-1958
> URL: https://issues.apache.org/jira/browse/PHOENIX-1958
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
>
> There's a significant amount of memory allocated when a new connection is
> established solely to create the ReadOnlyProps. Need to figure out a way to
> minimize this. It looks like the majority of memory allocations occur in this
> org.apache.phoenix.util.ReadOnlyProps constructor:
> https://github.com/apache/phoenix/blob/master/phoenix-core/src/main/java/org/apache/phoenix/util/ReadOnlyProps.java#L61
> Another notable memory allocator is this java.util.HashMap.putAll call:
> https://github.com/apache/phoenix/blob/master/phoenix-core/src/main/java/org/apache/phoenix/jdbc/PhoenixConnection.java#L192
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