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| <div class="refsect1"> |
| <h2 class="refsect1"><font face="arial, helvetica, sans-serif" color="#330099">query-results-cache.randomize-expiry</font></h2> |
| <p>Use <code>eclipselink.query-results-cache.randomize-expiry</code> to specify the expiry time (<a href="q_query-results-cache_expiry.htm#BABHGIHG">query-results-cache.expiry</a>) should be randomized by 10% of its set value.</p> |
| <a id="sthref687" name="sthref687"></a> |
| <p><strong><br /><span class="refsubsect">Values</span></strong></p> |
| <p><a href="#CBAJHJDF">Table 4-31</a> describes this query hint's values.</p> |
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| <p><strong><em><font face="arial, helvetica, sans-serif">Table 4-31 Valid Values for query-results-cache.randomize-expiry</font></em></strong></p> |
| <table class="HRuleFormalWide" title="Valid Values for query-results-cache.randomize-expiry" summary="Valid values for this extension" dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0"> |
| <col width="29%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t43"><font face="Arial, Helvetica, sans-serif"><strong>Value</strong></font></th> |
| <th align="left" valign="bottom" id="r1c2-t43"><font face="Arial, Helvetica, sans-serif"><strong>Description</strong></font></th> |
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| <p><code>true</code></p> |
| </td> |
| <td align="left" headers="r2c1-t43 r1c2-t43"> |
| <p>Randomize the expiration time by 10%.</p> |
| </td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t43" headers="r1c1-t43"> |
| <p><code>false</code></p> |
| </td> |
| <td align="left" headers="r3c1-t43 r1c2-t43"> |
| <p>(Default) Do not randomize the expiration time.</p> |
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| <p><strong><br /><span class="refsubsect">Usage</span></strong></p> |
| <p>Use this query hint to avoid bottlenecks from multiple cached values expiring at a fixed time.</p> |
| <a id="sthref690" name="sthref690"></a> |
| <p><strong><br /><span class="refsubsect">Examples</span></strong></p> |
| <div class="example"><a id="TLJPA811" name="TLJPA811"></a><a id="sthref691" name="sthref691"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 4-63 Using query-results-cache.randomize-expiry in a JPA Query</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| import org.eclipse.persistence.config.HintValues; |
| import org.eclipse.persistence.config.QueryHints; |
| query.setHint("eclipselink.QUERY_RESULTS_CACHE_RANDOMIZE_EXPIRY", "TRUE"); |
| </pre></div> |
| <!-- class="example" --> |
| <div class="example"><a id="TLJPA812" name="TLJPA812"></a><a id="sthref692" name="sthref692"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 4-64 Using query-results-cache.randomize-expiry in a @QueryHint Annotation</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| import org.eclipse.persistence.config.HintValues; |
| import org.eclipse.persistence.config.QueryHints; |
| @QueryHint(name=QueryHints.QUERY_RESULTS_CACHE_RANDOMIZE_EXPIRY, value="TRUE"); |
| </pre></div> |
| <!-- class="example" --> |
| <a id="sthref693" name="sthref693"></a> |
| <p><strong><br /><span class="refsubsect">See Also</span></strong></p> |
| <p>For more information, see:</p> |
| <ul> |
| <li> |
| <p><a href="q_query-results-cache.htm#CHDGEADJ">"query-results-cache"</a></p> |
| </li> |
| <li> |
| <p><a href="q_query-results-cache_expiry.htm#BABHGIHG">"query-results-cache.expiry"</a></p> |
| </li> |
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