Query Advisor Results

[ZeTToG]

Percona Toolkit

What does this mean?
Quote:

LIMIT with OFFSET

Paginating a result set with LIMIT and OFFSET is O(n^2) complexity, and will cause performance problems as the data grows larger. Pagination techniques such as bookmarked scans are much more efficient.

Rule ID: CLA.003

SELECT wp_yASdr_posts.ID FROM wp_yASdr_posts INNER JOIN wp_yASdr_term_relationships ON (wp_yASdr_posts.ID = wp_yASdr_term_relationships.object_id) INNER JOIN wp_yASdr_term_relationships AS tt1 ON (wp_yASdr_posts.ID = tt1.object_id) WHERE 1=1 AND wp_yASdr_posts.ID NOT IN (336896,336889,336883,336872,336870,336835,336859,336823,336826,336819,336804,336792,336797,336791,336777,336766,336774,336761,336751,336749,336731,336738,336571,335527,334433,333935,333216,336647,336583,336376,336521,336435,336410,336391,336297) AND ( wp_yASdr_term_relationships.term_taxonomy_id IN (4) AND tt1.term_taxonomy_id IN (43,56,57,58) ) AND wp_yASdr_posts.post_type = ‘post’ AND (wp_yASdr_posts.post_status = ‘publish’) GROUP BY wp_yASdr_posts.ID ORDER BY wp_yASdr_posts.post_date DESC LIMIT 0, 4;

By the way, this query is slow. Please help to optimize it. Thanks

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