SphinxClient::setLimits

(PECL sphinx >= 0.1.0)

SphinxClient::setLimits — 设置返回结果集偏移量和数目

说明

public bool SphinxClient::setLimits ( int $offset , int $limit [, int $max_matches = 0 [, int $cutoff = 0 ]] )

给服务器端结果集设置一个偏移量 offset 从那个偏移量起向客户端返回的匹配项数目限制(limit) . 并且可以在服务器端设定当前查询的结果集大小 (max_matches) ，另有一个阈值 (cutoff)，当找到的匹配项达到这个阀值时就停止搜索。

参数

offset: 结果集的偏移量.
limit: 返回的匹配项数目.
max_matches: 设置控制搜索过程中searchd在内存中所保持的匹配项数目.
cutoff: 该设置是为高级性能优化而提供的. 它告诉searchd 在找到并处理 cutoff 个匹配后就强制停止.

返回值

成功时返回 TRUE，或者在失败时返回 FALSE.

PHP手册 - N: 设置返回结果集偏移量和数目

用户评论:

xxxbunker dot com (22-Mar-2010 06:52)

the max_matches / cutoff parameters are priceless. if you ever have a situation where you need a 'count' of the number of matches, but only need to display lets say the 'top 10', these 2 parameters are very handy. we used to get the occasional 'unable to connect' error with sphinx, after implementing these 2 parameters where applicable, these issues disappeared, load dropped, and the servers were much happier.

shoanm at users dot sourceforge dot net (25-Aug-2009 11:06)

I almost pulled out all my hair trying to figure this one out. After applying limits using $s->setLimit(10,10); the search kept returning only false. getLastError() and getLastWarning() contained empty strings. The solution, like Nayana stated, is to add a positive non-zero integer $max to setLimit.

Nayana Hettiarachch nayana at corp-gems dot com (23-Jan-2009 04:36)

If you get an error per-query max_matches=0 out of bounds (per-server max_matches=1000). make sure that you also set the $max to a value other than the default 0, there is an issue published with a patch if you feel like wanting to patch, the first option works well as a workaround. http://sphinxsearch.com/bugs/view.php?id=208