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Posted to yarn-dev@hadoop.apache.org by "Hong Zhiguo (JIRA)" <ji...@apache.org> on 2014/07/19 16:23:38 UTC
[jira] [Created] (YARN-2323) FairShareComparator creates too much
Resource object
Hong Zhiguo created YARN-2323:
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Summary: FairShareComparator creates too much Resource object
Key: YARN-2323
URL: https://issues.apache.org/jira/browse/YARN-2323
Project: Hadoop YARN
Issue Type: Improvement
Components: fairscheduler
Reporter: Hong Zhiguo
Assignee: Hong Zhiguo
Priority: Minor
Each call of {{FairShareComparator}} creates a new Resource object "one":
{code}
Resource one = Resources.createResource(1);
{code}
At the volume of 1000 nodes and 1000 apps, the comparator will be called more than 10 million times per second, thus creating more than 10 million object "one", which is unnecessary.
Since the object "one" is read-only and is never referenced outside of comparator, we could make it static.
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