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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYTVmYzA5Y2RjMGI5NDhmMjg4YWVlM2VmNjVkMDExMjMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-13527?atlOrigin=eyJpIjoiYTVmYzA5Y2RjMGI5NDhmMjg4YWVlM2VmNjVkMDExMjMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-51406161-a730-4c6a-9558-00d351c6a59a" height="16" width="16" border="0" align="absmiddle" alt="Task" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-13527?atlOrigin=eyJpIjoiYTVmYzA5Y2RjMGI5NDhmMjg4YWVlM2VmNjVkMDExMjMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-13527</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="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/HHH-13527?atlOrigin=eyJpIjoiYTVmYzA5Y2RjMGI5NDhmMjg4YWVlM2VmNjVkMDExMjMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Performance regression in org.hibernate.stat.internal.StatisticsImpl</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-51406161-a730-4c6a-9558-00d351c6a59a" height="16" width="16" border="0" align="absmiddle" alt="Task" style="vertical-align: text-bottom"> Task </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.3.10, 5.4.4 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="sanne" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_sanne" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A99e61e65-956b-4a21-b29c-06057642e9ea"> Sanne Grinovero </a> </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 31/Jul/2019 02:26 AM </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="sanne" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_sanne" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A99e61e65-956b-4a21-b29c-06057642e9ea"> Sanne Grinovero </a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Today's performance tests found contention for java.util.concurrent.ConcurrentHashMap.computeIfAbsent from org.hibernate.stat.internal.StatisticsImpl.getDomainDataRegionStatistics and org.hibernate.stat.internal.StatisticsImpl.getEntityStatistics totaling 6 hours in a 16m performance test.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I do not see the same contention in older 5.3 versions. We see contention when statistics-enabled=true or false and when we turn off our management interface polling. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Stack trace from JFR:</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Stack Trace Count Duration</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
java.util.concurrent.ConcurrentHashMap.computeIfAbsent(<span class="code-object" style="color: #910091">Object</span>, Function) 4,059,667 22,103,670,297,274
org.hibernate.stat.internal.StatisticsImpl.getDomainDataRegionStatistics(<span class="code-object" style="color: #910091">String</span>) 2,208,114 12,840,075,270,929
org.hibernate.stat.internal.StatisticsImpl.entityCacheHit(NavigableRole, <span class="code-object" style="color: #910091">String</span>) 2,208,114 12,840,075,270,929
org.hibernate.event.internal.DefaultLoadEventListener.getFromSharedCache(LoadEvent, EntityPersister, SessionImplementor) 2,208,114 12,840,075,270,929
org.hibernate.event.internal.DefaultLoadEventListener.loadFromSecondLevelCache(LoadEvent, EntityPersister, EntityKey) 2,208,114 12,840,075,270,929
org.hibernate.stat.internal.StatisticsImpl.getEntityStatistics(<span class="code-object" style="color: #910091">String</span>) 1,851,546 9,263,580,116,404
org.hibernate.stat.internal.StatisticsImpl.entityCacheHit(NavigableRole, <span class="code-object" style="color: #910091">String</span>) 1,851,484 9,263,445,104,340
org.hibernate.event.internal.DefaultLoadEventListener.getFromSharedCache(LoadEvent, EntityPersister, SessionImplementor) 1,851,484 9,263,445,104,340
org.hibernate.event.internal.DefaultLoadEventListener.loadFromSecondLevelCache(LoadEvent, EntityPersister, EntityKey) 1,851,484 9,263,445,104,340
org.hibernate.event.internal.DefaultLoadEventListener.doLoad(LoadEvent, EntityPersister, EntityKey, LoadEventListener$LoadType) 1,851,484 9,263,445,104,340
org.hibernate.event.internal.DefaultLoadEventListener.load(LoadEvent, EntityPersister, EntityKey, LoadEventListener$LoadType) 1,851,484 9,263,445,104,340
org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(LoadEvent, EntityPersister, EntityKey, LoadEventListener$LoadType) 1,851,484 9,263,445,104,340
org.hibernate.stat.internal.StatisticsImpl.loadEntity(<span class="code-object" style="color: #910091">String</span>) 47 97,990,202
</pre>
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