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<td id="page-title-pattern-first-line" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 16px"> <a href="https://hibernate.atlassian.net/browse/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-1367" style="color: #3b73af; text-decoration: none"><img src="https://hibernate.atlassian.net/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug" /></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-1367" style="color: #3b73af; text-decoration: none">HSEARCH-1367</a>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" id="page-title-pattern-header-container"> <span id="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-1367" style="color: #3b73af; text-decoration: none">FullTextQuery with max results of 250 takes considerable time to load entities</a> </span>
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Issue Type:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding-left: 5px; vertical-align: top"> <img src="https://hibernate.atlassian.net/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug" /> Bug
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Affects Versions:
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4.3.0.Final
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Assignee:
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Unassigned
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Components:
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query
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Created:
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17/Jul/13 8:50 AM
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Environment:
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Hibernate 4.2.2, SQL Server 2008
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Priority:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding-left: 5px; vertical-align: top"> <img src="https://hibernate.atlassian.net/images/icons/priorities/major.png" height="16" width="16" border="0" align="absmiddle" alt="Major" /> Major
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding-left: 5px; vertical-align: top"> <a class="user-hover" rel="crancran" id="email_crancran" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=crancran" style="color:#6c797f;; color: #3b73af; text-decoration: none">Chris Cranford</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Our search form allows users to specify the size of their results to be either 25, 50, 100, or 250. We have noticed for this particular implementation that the response for 25/50 is within acceptable application response times; however, when selecting 100 or 250 they times are exponentially slower.</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">FullTextQuery ftQuery = ftSession.createFullTextQuery(query, Item.class);<br /> ftQuery.setFirstResult((pagNumber-1)*pageSize).setMaxResult(pageSize);<br /> int totalHits = ftQuery.getResultSize();<br /> List<?> results = ftQuery.list();</p>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">When adding debugging, to the above code, it's obvious that the issue is during the call to list() on the query and nothing else.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The query generated looks similar to the following:</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">SELECT (bunch of fields)<br /> FROM items this_<br /> WHERE (( (this_.ITEM_ID = ? AND this_.PLANT_ID = ?) <br /> OR (this_.ITEM_ID = ? AND this_.PLANT_ID = ?)<br /> OR ...<br /> ))</p>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">As the number of bind parameters <img class="emoticon" src="https://hibernate.atlassian.net/images/icons/emoticons/help_16.gif" height="16" width="16" align="absmiddle" alt="" border="0" /> increase, the speed of returning the results degrades exponentially. One DBA claims it is due to all the OR operators that get generated for the database fetch in the WHERE clause, but I've ran the generated SQL select statement from within Toad but without bind parameters and it runs in under 100ms.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I need to determine what is the slow down with list() when the page size is anything greater than 50.</p>
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