Bug #27199 | Performance problem when query contains a left join against a subquery | ||
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Submitted: | 16 Mar 2007 5:03 | Modified: | 9 Sep 2013 9:28 |
Reporter: | Stephen Gornick | Email Updates: | |
Status: | Closed | Impact on me: | |
Category: | MySQL Server: Optimizer | Severity: | S2 (Serious) |
Version: | 5.0.22, 5.0.37, 4.1 BK, 5.1 BK | OS: | Linux (linux) |
Assigned to: | Assigned Account | CPU Architecture: | Any |
Tags: | 100%, 5.0.22, 5.0.37, cpu, derived, derived table, join, left, left join, MAX, maxed, Optimize, optimized, Optimizer, outer, OUTER JOIN, peg, pegged, subquery, table |
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