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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 83912 | 2016-11-21 15:28 | 2020-03-09 16:52 | MySQL Server: Performance Schema | Verified (3523 days) | S3 | 5.6, 5.7, 5.6.34 | Any | Any | Time spent sleeping before entering InnoDB is not measured/reported separately |
| 84858 | 2017-02-07 13:09 | 2017-02-09 6:34 | MySQL Server: Optimizer | Verified (3445 days) | S3 | 5.6, 5.7, 5.6.35 | Any | Any | Time is spent at "statistics" stage for primary key lookups |
| 120772 | 2026-06-25 10:27 | 2026-07-08 9:03 | MySQL Server: Optimizer | Verified (9 days) | S5 | 9.7.1 and 8.0.31 | Ubuntu (22.04.4 LTS) | x86 (Intel(R) Xeon(R) Gold 5220 CPU @ 2.20GHz) | UPDATE HISTOGRAM causes optimizer to use stale cardinalities and miss faster join order |
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