| Bug #82725 | Extremely slow query when optimizer_switch='derived_merge=ON' | ||
|---|---|---|---|
| Submitted: | 25 Aug 2016 15:55 | Modified: | 14 Sep 2016 6:26 |
| Reporter: | Zaihua Ji | Email Updates: | |
| Status: | Verified | Impact on me: | |
| Category: | MySQL Server: Optimizer | Severity: | S5 (Performance) |
| Version: | 5.7.14, 5.7.15 | OS: | CentOS (Linux rda-db-rep.ucar.edu 3.10.0-327.28.2.el7.x86_64 #1 SMP Wed Aug 3 11:11:39 UTC 2016 x86_64 x86_6) |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | derived_merge, optimizer_switch | ||
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