Karthik Ranganathan created HBASE-7026:
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Summary: Make metrics collection in StoreScanner.java more
efficient
Key: HBASE-7026
URL: https://issues.apache.org/jira/browse/HBASE-7026
Project: HBase
Issue Type: Sub-task
Reporter: Karthik Ranganathan
Assignee: Karthik Ranganathan
Per the benchmarks I ran, the following block of code seems to be inefficient:
StoreScanner.java:
public synchronized boolean next(List<KeyValue> outResult, int limit,
String metric) throws IOException {
// ...
// update the counter
if (addedResultsSize > 0 && metric != null) {
HRegion.incrNumericMetric(this.metricNamePrefix + metric,
addedResultsSize);
}
// ...
Removing this block increased throughput by 10%. We should move this to the
outer layer.
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