| Bug #76280 | Select count(*) in MySQL5.7 is slower than in MySQL5.6 in case of out of memory | ||
|---|---|---|---|
| Submitted: | 12 Mar 2015 8:55 | Modified: | 12 Oct 2016 9:29 |
| Reporter: | 頭突 大井 | Email Updates: | |
| Status: | Duplicate | Impact on me: | |
| Category: | MySQL Server: Optimizer | Severity: | S5 (Performance) |
| Version: | 5.7.5-m15 | OS: | Linux |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | select count, slow | ||
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
