High use of CPU

Wladimir_Celedon
Wed, 24 Sep 2025 13:43:37 +0000
Ignition

Hi.

I’ve been watching the use of CPU in Ignition 7.9.5, for some reason it goes up to 96% and it doesn’t go down after a restart. I checked the threads and say many of them that describes:

Thread [webserver-230] id=230, (RUNNABLE)
java.util.ComparableTimSort.minRunLength(Unknown Source)
java.util.ComparableTimSort.sort(Unknown Source)
java.util.Arrays.sort(Unknown Source)
java.util.Arrays.sort(Unknown Source)
java.util.ArrayList.sort(Unknown Source)
java.util.Collections.sort(Unknown Source)
com.inductiveautomation.ignition.common.util.TimelineList.sort(TimelineList.java:24)
com.inductiveautomation.ignition.common.util.TimelineList.add(TimelineList.java:117)
com.inductiveautomation.ignition.common.util.TimelineList.add(TimelineList.java:68)
com.inductiveautomation.ignition.common.util.Timeline.addSegment(Timeline.java:46)
com.inductiveautomation.gateway.tags.history.query.SCExecRecord.addToTimeline(SCExecRecord.java:185)
com.inductiveautomation.gateway.tags.history.query.DatasourceQueryExecutor.initialize(DatasourceQueryExecutor.java:651)
com.inductiveautomation.ignition.gateway.sqltags.history.query.AggregateHistoryQueryExecutor.initialize(AggregateHistoryQueryExecutor.java:78)
com.inductiveautomation.ignition.gateway.sqltags.history.query.HistoryWriter.initLoader(HistoryWriter.java:140)
com.inductiveautomation.ignition.gateway.sqltags.history.query.HistoryWriter.execute(HistoryWriter.java:210)
com.inductiveautomation.ignition.gateway.sqltags.SQLTagsManagerImpl.queryHistory(SQLTagsManagerImpl.java:1297)
com.inductiveautomation.ignition.gateway.project.ProjectSettingsCache$ProjectDefaultTagManagerFacade.queryHistory(ProjectSettingsCache.java:666)
com.inductiveautomation.ignition.gateway.servlets.gateway.functions.QueryTagHistory.invoke(QueryTagHistory.java:96)
com.inductiveautomation.ignition.gateway.servlets.Gateway.doPost(Gateway.java:405)
javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:85)
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:837)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
org.eclipse.jetty.server.Server.handle(Server.java:518)
org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
java.lang.Thread.run(Unknown Source)

What is the meaning of that?.

3 posts - 3 participants