Description:
Results of test-connect scenario from mysql-bench suite for 5.1.40/MyISAM showed
some performance degradation:
5.1.39 | 5.1.40
run1 run2 run3 | run1 run2 run3
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Time to connect (10000): 3.082 3.086 3.108 | 3.538 3.522 3.535
Time for connect+select_simple (10000): 3.409 3.404 3.431 | 3.991 3.971 3.991
Time for select_simple (100000): 3.100 3.109 3.109 | 4.325 4.286 4.271
Time for select_simple_cache (100000): 3.038 3.025 3.039 | 4.251 4.218 4.206
Time to connect+select_1_row (10000): 3.687 3.679 3.952 | 4.295 4.277 4.286
Time to select_1_row (100000): 5.144 5.173 5.912 | 6.526 6.472 6.499
Time to select_1_row_cache (100000): 4.811 4.820 5.546 | 6.145 6.115 6.126
Time to select_2_rows (100000): 5.631 5.664 6.571 | 6.995 6.930 6.967
Time for select_column+column (100000): 5.588 5.626 6.360 | 6.939 6.886 6.908
Time to select_big_str (10000): 2.310 2.314 2.793 | 2.863 2.857 2.868
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Total: 39.81 39.91 43.83 | 49.88 49.54 49.66
How to repeat:
Run test-connect from mysql-bench for 5.1.39/5.1.40