Chesnay Schepler created FLINK-10082:
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Summary: Initialize StringBuilder in Slf4jReporter with estimated
size
Key: FLINK-10082
URL: https://issues.apache.org/jira/browse/FLINK-10082
Project: Flink
Issue Type: Improvement
Components: Metrics
Affects Versions: 1.5.2, 1.6.0
Reporter: Chesnay Schepler
Assignee: Chesnay Schepler
The {{Slf4jReporter}} uses a StringBuilder to generate the report that is later
logged. Currently we don't pass the initial size, which for large deployments
can result in frequent resizing of the backing array.
We could either estimate the expected size based on the # of metrics, or store
the size of the last report (given that the total metrics space is fairly
constant).
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