Karthik Ranganathan created HBASE-7163:
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Summary: Change cachedRegionsLocations in HConnectionManager from
SoftValueSortedMap to ConcurrentSkipListMap
Key: HBASE-7163
URL: https://issues.apache.org/jira/browse/HBASE-7163
Project: HBase
Issue Type: Sub-task
Reporter: Karthik Ranganathan
Assignee: Karthik Ranganathan
This change saves 15% CPU on the client side per profiling. In using the
ConcurrentSkipListMap, we can do:
tableLocations.floorEntry(row).getValue()
instead of doing:
SortedMap<byte[], HRegionLocation> matchingRegions =
tableLocations.floorEntry(row).getValue();
if (!matchingRegions.isEmpty()) {
HRegionLocation possibleRegion =
matchingRegions.get(matchingRegions.lastKey());
}
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