- XF Compatibility
- 2.2.x
- Short Description
- Download and Discuss Premium, BusinessOptimized List Queries by Xon 2.12.0 version on Premium Content Best Download Discussion Community. It is zip Extention type and 26.7 KB File size. From Optimized List Queries by Xon have 1 Description Attachments, 6 discussion, 6 Updates, 405 Views.
This addon is aimed at large forum with tens of thousands to hundreds of thousands or more threads in a single forum. Smaller forum do not gain much benefit from this add-on.
Forum/conversation lists:
MySQL implements 'early row lookup', when combined with LIMIT & OFFSET with a large offset, results in the large select statement pulling in more data than is required. Maybe one day MySQL will fix this. Maybe.
This causes an issue as this how conversations and threads implement paging.
This addon provides some optimized query for getting threads in a forum with large number of threads, or for conversations with a veryhigh page count.
Ideally conversations would implement the position system like posts do, which would be even faster than using sub-selects to force 'late row lookup'.
For more information see:
Under "Performance":
Contributing features or bug fixes
Please create a Github Pull request via the "More Information" link.
Contributions
If you appreciate this add-on, please consider a contribution via PayPal. Details will be provide via private conversation.
Please contact me if you wish for different licencing arrangements.
Forum/conversation lists:
MySQL implements 'early row lookup', when combined with LIMIT & OFFSET with a large offset, results in the large select statement pulling in more data than is required. Maybe one day MySQL will fix this. Maybe.
This causes an issue as this how conversations and threads implement paging.
This addon provides some optimized query for getting threads in a forum with large number of threads, or for conversations with a veryhigh page count.
Ideally conversations would implement the position system like posts do, which would be even faster than using sub-selects to force 'late row lookup'.
For more information see:
- http://stackoverflow.com/questions/4481388/why-does-mysql-higher-limit-offset-slow-the-query-down
- http://explainextended.com/2009/10/23/mysql-order-by-limit-performance-late-row-lookups/
Under "Performance":
Contributing features or bug fixes
Please create a Github Pull request via the "More Information" link.
Contributions
If you appreciate this add-on, please consider a contribution via PayPal. Details will be provide via private conversation.
Please contact me if you wish for different licencing arrangements.
