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https://issues.apache.org/jira/browse/CASSANDRA-2681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Burroughs reopened CASSANDRA-2681:
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Need to update in build.xml for the generated pom as well.
> Upgrade ConcurrentLinkedHashMap (v1.2)
> --------------------------------------
>
> Key: CASSANDRA-2681
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2681
> Project: Cassandra
> Issue Type: Task
> Components: Core
> Reporter: Ben Manes
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 1.0
>
>
> This release has numerous performance improvements. See the change log for
> details.
> It also includes a few useful features that may be of interest,
> - Snapshot iteration in order of hotness (CASSANDRA-1966)
> - Optionally defer LRU maintenance penalty to a background executor (instead
> of amortized on caller threads) (Note that this setting is not advised if
> write storms are not rate limited, since it defers eviction until the
> executor runs.)
> http://code.google.com/p/concurrentlinkedhashmap/
> http://code.google.com/p/concurrentlinkedhashmap/wiki/ExampleUsage
> Verified compatibility with NonBlockingHashMap. Cassandra may want to
> consider adding the java_util_concurrent_chm.jar to the bootclasspath to swap
> all CHM usages with NBHM (CLHM is a decorator on top of CHM).
> http://high-scale-lib.cvs.sourceforge.net/viewvc/high-scale-lib/high-scale-lib/README
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