| Bug #46648 | SQL_CALC_FOUND_ROWS kills performance with ORDER BY and LIMIT | ||
|---|---|---|---|
| Submitted: | 11 Aug 2009 11:41 | Modified: | 17 Aug 2009 13:36 |
| Reporter: | Jille Timmermans | Email Updates: | |
| Status: | Verified | Impact on me: | |
| Category: | MySQL Server: Optimizer | Severity: | S3 (Non-critical) |
| Version: | 5.1.32, 4.1, 5.0, 5.1, azalea bzr | OS: | Linux (2.6.28.7) |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | limit, order by, performance, sql_calc_found_rows | ||
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
[12 Aug 2009 6:20]
Sveta Smirnova
