CPU Spikes Every 5 Minutes
(Doc ID 1569224.1)
Last updated on JANUARY 10, 2024
Applies to:
Oracle WebCenter Sites - Version 11.1.1.6.0 and laterInformation in this document applies to any platform.
Symptoms
WebCenter Sites starts using high CPU and becomes less responsive for a short while. This happens every 5 minutes.
Thread dumps taken during such CPU spikes show threads with name "Store pageByQry Spool Thread" writing to files. E.g.
"Store pageByQry Spool Thread" daemon prio=10 tid=0x00007f57fc095000 nid=0x2412 runnable [0x00007f5755bda000]
java.lang.Thread.State: RUNNABLE
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(FileOutputStream.java:282)
at java.io.ObjectOutputStream$BlockDataOutputStream.write(ObjectOutputStream.java:1812)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1504)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.java:1247)
at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:940)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at net.sf.ehcache.store.DiskStore.writeIndex(DiskStore.java:847)
- locked <0x0000000683c5a858> (a net.sf.ehcache.store.DiskStore)
at net.sf.ehcache.store.DiskStore.throwableSafeFlushSpoolIfRequired(DiskStore.java:674)
- locked <0x0000000683c5f1a8> (a java.lang.Object)
at net.sf.ehcache.store.DiskStore.spoolAndExpiryThreadMain(DiskStore.java:640)
at net.sf.ehcache.store.DiskStore.access$900(DiskStore.java:68)
at net.sf.ehcache.store.DiskStore$SpoolAndExpiryThread.run(DiskStore.java:1110)
Changes
Cause
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In this Document
Symptoms |
Changes |
Cause |
Solution |
References |