Bug #41885 | Falcon: slowdown in 6.0.9 in update_of_key_big test from mysql-bench suite | ||
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Submitted: | 5 Jan 2009 20:15 | Modified: | 26 May 2010 17:50 |
Reporter: | Alexey Stroganov | Email Updates: | |
Status: | Unsupported | Impact on me: | |
Category: | MySQL Server: Falcon storage engine | Severity: | S3 (Non-critical) |
Version: | 6.0.9-release | OS: | Any |
Assigned to: | Olav Sandstå | CPU Architecture: | Any |
Tags: | F_PERFORMANCE, regression |
[5 Jan 2009 20:15]
Alexey Stroganov
[5 Jan 2009 20:19]
Alexey Stroganov
Test case for the issue
Attachment: bug-update_of_key_big.pl (application/octet-stream, text), 2.35 KiB.
[7 Jan 2009 6:25]
Kevin Lewis
Ranger, Does this slowdown occur when you turn off MRR?
[8 Jan 2009 16:38]
Alexey Stroganov
Kevin, Disabling of MRR doesn't affect results: MySQL 6.0.8 alpha, ENGINE: Falcon @optimizer_use_mrr=force Time for update_of_key_big (496): 22 wallclock secs MySQL 6.0.8 alpha, ENGINE: Falcon @optimizer_use_mrr=disable Time for update_of_key_big (496): 22 wallclock secs MySQL 6.0.9 alpha, ENGINE: Falcon @optimizer_use_mrr=force Time for update_of_key_big (496): 46 wallclock secs MySQL 6.0.9 alpha, ENGINE: Falcon @optimizer_use_mrr=disable Time for update_of_key_big (496): 44 wallclock secs