Clebert Suconic created ARTEMIS-4773:
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Summary: Performance improvement on page.sync
Key: ARTEMIS-4773
URL: https://issues.apache.org/jira/browse/ARTEMIS-4773
Project: ActiveMQ Artemis
Issue Type: Improvement
Reporter: Clebert Suconic
PagingStoreImpl::ioSync is holding a readWriteLock while calling sync:
https://github.com/apache/activemq-artemis/blob/c523458a9aa4f67ad0e9bdbc5c4733bc88bf55f6/artemis-server/src/main/java/org/apache/activemq/artemis/core/paging/impl/PagingStoreImpl.java#L516-L529
However that's causing a contention on adding new data:
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x000000008087a170> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:715)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:938)
at
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock([email protected]/ReentrantReadWriteLock.java:959)
at
org.apache.activemq.artemis.core.paging.impl.PagingStoreImpl.writePage(PagingStoreImpl.java:1249)
at
org.apache.activemq.artemis.core.paging.impl.PagingStoreImpl.page(PagingStoreImpl.java:1242)
at
org.apache.activemq.artemis.core.paging.impl.PagingStoreImpl.page(PagingStoreImpl.java:1173)
at
org.apache.activemq.artemis.core.persistence.impl.journal.AbstractJournalStorageManager.addToPage(AbstractJournalStorageManager.java:2256
To fix that I'm going to remove the sync from the readWriteLock. and Ignore an
alreadyClosedException.
I tested this, and also an user and the improvement was significant, especially
with a slower device (that's actually more common on cloud providers these
days).
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