| Bug #42908 | Performance degradation on SELECT_DISTINCT_RANGES (as in Sysbench) | ||
|---|---|---|---|
| Submitted: | 17 Feb 2009 1:20 | Modified: | 7 Nov 2010 11:29 |
| Reporter: | Elena Stepanova | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server | Severity: | S5 (Performance) |
| Version: | 5.0.74, 5.0.76, 5.0.77 | OS: | Linux (SLES 10) |
| Assigned to: | Elena Stepanova | CPU Architecture: | Any |
If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.
To split a large file:
- On *nix platforms use the split command e.g.
split -b 50MB <my_large_archive> <my_split_archive_prefix> - On windows use WinZip or a similar utility to split the large file
[23 Feb 2009 2:39]
Elena Stepanova
[23 Feb 2009 2:40]
Elena Stepanova
Runs a few sysbench-like SELECT DISTINCT queries along with EXPLAIN
Attachment: 42908_run.sql (application/octet-stream, text), 872 bytes.
[23 Feb 2009 3:15]
Elena Stepanova
Result of 42908_run.sql execution on box #2
Attachment: 42908_run_result.txt (text/plain), 9.62 KiB.
