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| View Revisions: Issue #20515 | [ All Revisions ] [ Back to Issue ] | ||
| Summary | 0020515: OBCriteria creates contention at JVM | ||
| Revision | 2017-02-15 12:42 by alostale | ||
| Steps To Reproduce | Execute attached test cases which executes 50000 times a very simple sql comparing times between OBCriteria and OBQuery. These 50000 executions are done splitting them from 1 to 8 threads. The results in a laptop with 8 cores are: Criteria with 1 threads done in 14985 ms Criteria with 2 threads done in 13768 ms Criteria with 3 threads done in 14811 ms Criteria with 4 threads done in 14988 ms Criteria with 5 threads done in 15200 ms Criteria with 6 threads done in 15388 ms Criteria with 7 threads done in 15311 ms Criteria with 8 threads done in 15401 ms Query with 1 threads done in 3728 ms Query with 2 threads done in 1743 ms Query with 3 threads done in 1287 ms Query with 4 threads done in 1187 ms Query with 5 threads done in 1121 ms Query with 6 threads done in 1067 ms Query with 7 threads done in 1000 ms Query with 8 threads done in 955 ms Here we can see OBCriteria overhead is 5 times OBQuery's. But not only that, but parallel executions do not improve throughput in criteria's case. |
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| Revision | 2017-02-15 12:38 by alostale | ||
| Steps To Reproduce | See 0020485 | ||
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