Daniel Norberg created CASSANDRA-4710:
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Summary: High key hashing overhead for index scans when using
RandomPartitioner
Key: CASSANDRA-4710
URL: https://issues.apache.org/jira/browse/CASSANDRA-4710
Project: Cassandra
Issue Type: Bug
Reporter: Daniel Norberg
For a workload where the dataset is completely in ram, the md5 hashing of the
keys during index scans becomes a bottleneck for reads when using
RandomPartitioner, according to profiling.
Instead performing a raw key equals check in SSTableReader.getPosition() for EQ
operations improves throughput by some 30% for my workload (moving the
bottleneck elsewhere).
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