Bug #91598 | Anti-joins running very slowly | ||
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Submitted: | 11 Jul 2018 11:52 | Modified: | 12 Jul 2018 12:51 |
Reporter: | Greg Obenshain | Email Updates: | |
Status: | Can't repeat | Impact on me: | |
Category: | MySQL Server: DML | Severity: | S3 (Non-critical) |
Version: | 8.0.11 | OS: | Windows (Microsoft Windows 10 Home) |
Assigned to: | CPU Architecture: | Any | |
Tags: | WBBugReporter |
[11 Jul 2018 11:52]
Greg Obenshain
[11 Jul 2018 15:08]
MySQL Verification Team
Performance regressions in the single-threaded read-only, but also in read-write operations, is quite well known phenomena. This bug is a duplicate of this bug: https://bugs.mysql.com/bug.php?id=68825
[11 Jul 2018 15:10]
MySQL Verification Team
This bug could also be a duplicate of this one: https://bugs.mysql.com/bug.php?id=68979
[12 Jul 2018 12:51]
MySQL Verification Team
We concluded that we can not claim that this is a duplicate. That is because we do not have performance info from previous versions, nor do we have optimiser plans and traces from both versions. Last , but not least, we can not repeat the behaviour without full dumps and all data mentioned above.