protected void verifyResultsAndUpdateMetrics(boolean verify, Get get, long elapsedNano,
      Result result, Table table, boolean isNullExpected) throws IOException {
      verifyResultsAndUpdateMetrics(verify, new Get[] { get }, elapsedNano, new Result[] { result },
        table, isNullExpected);
    }
Should only be used for the concurrent writer/reader workload. The maximum key we are allowed
to read, subject to the "key window" constraint.
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/util/MultiThreadedReader.java