Here is another micro-benchmark to prove that Performance Schema overhead is so serious.
non-persistent connections from remote machine, 100 concurrency, MySQL 5.6.13
Benchmark command is the same as what I published long time ago.
I understand almost all applications don't need 20000~30000 connections per second per instance, but latency increase should be considered. It would be better to make performance_schema parameter dynamic, and set 0 as default.
non-persistent connections from remote machine, 100 concurrency, MySQL 5.6.13
| performance_schema | connections per second |
| 0 | 39525.62 |
| 1(default) | 26304.53 |
Benchmark command is the same as what I published long time ago.
I understand almost all applications don't need 20000~30000 connections per second per instance, but latency increase should be considered. It would be better to make performance_schema parameter dynamic, and set 0 as default.
