# Ignitions edge 8.1.1 high CPU and Memory **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [May 16, 2023, 12:08pm UTC](https://forum.inductiveautomation.com/t/ignitions-edge-8-1-1-high-cpu-and-memory/73767 "2023-05-16T12:08:30Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Apostolis\_Michailidi](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Apostolis\_Michailidi](https://forum.inductiveautomation.com/u/Apostolis_Michailidi)\ **Post date:** [May 16, 2023, 12:08pm UTC](https://forum.inductiveautomation.com/t/ignitions-edge-8-1-1-high-cpu-and-memory/73767/1 "2023-05-16T12:08:30Z")
Dear all good day, We are facing an issue with an ignition edge 8.1.1 version which consumes more than 75% CPU and almost 3.5GB of memory of the 4GB allocated in ignition.conf On the status page – threads we see a lot of the following messages. Quote Thread [gateway-tags-eventscripts-3] id=74, (BLOCKED) app//com.inductiveautomation.ignition.gateway.tags.runtime.nodes.FolderNode.getChildTag(FolderNode.java:315) app//com.inductiveautomation.ignition.gateway.tags.runtime.nodes.FolderNode.getChildNode(FolderNode.java:331) app//com.inductiveautomation.ignition.gateway.tags.runtime.TagEvaluationManagerImpl.locate(TagEvaluationManagerImpl.java:137) app//com.inductiveautomation.ignition.gateway.tags.TagProviderImpl.writeAsync(TagProviderImpl.java:555) app//com.inductiveautomation.ignition.gateway.tags.model.impl.GatewayTagManagerImpl.lambda$writeAsync$13(GatewayTagManagerImpl.java:693) app//com.inductiveautomation.ignition.gateway.tags.model.impl.GatewayTagManagerImpl$$Lambda$2587/0x00000008010f2040.map(Unknown Source) app//com.inductiveautomation.ignition.gateway.util.GroupMapCollate.lambda$groupMapCollateIndexed$5(GroupMapCollate.java:53) app//com.inductiveautomation.ignition.gateway.util.GroupMapCollate$$Lambda$2586/0x00000008010f2c40.apply(Unknown Source) java.base@11.0.7/java.util.stream.ReferencePipeline$3$1.accept(Unknown Source) java.base@11.0.7/java.util.HashMap$EntrySpliterator.forEachRemaining(Unknown Source) java.base@11.0.7/java.util.stream.AbstractPipeline.copyInto(Unknown Source) java.base@11.0.7/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) java.base@11.0.7/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) java.base@11.0.7/java.util.stream.AbstractPipeline.evaluate(Unknown Source) java.base@11.0.7/java.util.stream.ReferencePipeline.collect(Unknown Source) app//com.inductiveautomation.ignition.common.util.Futures.sequence(Futures.java:26) app//com.inductiveautomation.ignition.gateway.util.GroupMapCollate.groupMapCollateIndexed(GroupMapCollate.java:62) app//com.inductiveautomation.ignition.gateway.tags.model.impl.GatewayTagManagerImpl.writeAsync(GatewayTagManagerImpl.java:677) app//com.inductiveautomation.ignition.gateway.script.LegacyGatewayTagUtilities.writeToTagsImpl(LegacyGatewayTagUtilities.java:533) app//com.inductiveautomation.ignition.gateway.script.LegacyGatewayTagUtilities.writeToTagImpl(LegacyGatewayTagUtilities.java:523) app//com.inductiveautomation.ignition.common.script.builtin.LegacyTagUtilities.write(LegacyTagUtilities.java:290) jdk.internal.reflect.GeneratedMethodAccessor19.invoke(Unknown Source) java.base@11.0.7/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.base@11.0.7/java.lang.reflect.Method.invoke(Unknown Source) app//org.python.core.PyReflectedFunction. **call** (PyReflectedFunction.java:188) app//com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. **call** (ScriptManager.java:523) app//org.python.core.PyObject. **call** (PyObject.java:497) app//org.python.core.PyObject. **call** (PyObject.java:501) org.python.pycode._pyx247.valueChanged$1(tagevent:valueChanged:17) org.python.pycode.pyx247.call\_function(tagevent:valueChanged) app//org.python.core.PyTableCode.call(PyTableCode.java:171) app//org.python.core.PyBaseCode.call(PyBaseCode.java:308) app//org.python.core.PyFunction.function\_\_\_call_(PyFunction.java:471) app//org.python.core.PyFunction. **call** (PyFunction.java:466) app//org.python.core.PyFunction. **call** (PyFunction.java:461) app//com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:821) app//com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:805) app//com.inductiveautomation.ignition.gateway.tags.scripting.TagScriptManagerImpl$FunctionInvokerImpl.run(TagScriptManagerImpl.java:527) app//com.inductiveautomation.ignition.gateway.tags.scripting.events.AbstractTagScript.invoke(AbstractTagScript.java:34) app//com.inductiveautomation.ignition.gateway.tags.scripting.TagScriptManagerImpl$Task.invoke(TagScriptManagerImpl.java:476) app//com.inductiveautomation.ignition.gateway.tags.scripting.TagScriptManagerImpl$TagScriptDispatcher.run(TagScriptManagerImpl.java:439) app//com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518) java.base@11.0.7/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) java.base@11.0.7/java.util.concurrent.FutureTask.run(Unknown Source) java.base@11.0.7/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) java.base@11.0.7/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.base@11.0.7/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.base@11.0.7/java.lang.Thread.run(Unknown Source) unquote we have the same exact installation on 51 edge systems but we are facing this issue only with one. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [May 16, 2023, 12:43pm UTC](https://forum.inductiveautomation.com/t/ignitions-edge-8-1-1-high-cpu-and-memory/73767/2 "2023-05-16T12:43:21Z")
> [@Apostolis\_Michailidi](#): > > Thread [gateway-tags-eventscripts-3] id=74, (BLOCKED) > app//com.inductiveautomation.ignition.gateway.tags.runtime.nodes.FolderNode.getChildTag Tag event scripts. Common programming error. These scripts are not allowed to do anything complicated or that take more than a millisecond or three, as the thread pool is shared, and if plugged, will bog down your whole system. The `.getChildTag()` call suggests that some tag event script is doing one of the `system.tag.browse*` operations, which can be very time-consuming. Don't do that. ---
**Author:** ![Apostolis\_Michailidi](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Apostolis\_Michailidi](https://forum.inductiveautomation.com/u/Apostolis_Michailidi)\ **Post date:** [May 16, 2023, 12:53pm UTC](https://forum.inductiveautomation.com/t/ignitions-edge-8-1-1-high-cpu-and-memory/73767/3 "2023-05-16T12:53:33Z")
Thank you for your answer. My problem is how to find which script is causing the problem cause there are more than 200 scripts running. should i search for write.blocking and assign a specific timeout on the script? ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [May 16, 2023, 1:01pm UTC](https://forum.inductiveautomation.com/t/ignitions-edge-8-1-1-high-cpu-and-memory/73767/4 "2023-05-16T13:01:42Z")
Search for `system.*.browse*`. Possibly also search for `system.*.*query*` (case insensitive) and `system.net.*` to catch a bunch of other time-consuming stuff. Don't use any of these in tag events. Use a project's tag change event and/or re-architect the events to not need a time-consuming callout.