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ARTEMIS-1728 Reclaim memory when page cursor complete 

Free hash set used to hold page position for acks and removed refs.
The two set is cleared, but they still hold a big array.

It is safe to replace the old one with empty set.
This commit is contained in:
huaishk 2018-03-05 17:32:29 +08:00 committed by Clebert Suconic
parent 79ad9cb254
commit 7f606a4690
1 changed files with 4 additions and 2 deletions
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6
artemis-server/src/main/java/org/apache/activemq/artemis/core/paging/cursor/impl/PageSubscriptionImpl.java
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@ -334,7 +334,9 @@ final class PageSubscriptionImpl implements PageSubscription {
}
infoPG.acks.clear();
infoPG.acks = Collections.synchronizedSet(new LinkedHashSet<PagePosition>());
infoPG.removedReferences.clear();
infoPG.removedReferences = new ConcurrentHashSet<>();
}
tx.addOperation(new TransactionOperationAbstract() {
@ -901,11 +903,11 @@ final class PageSubscriptionImpl implements PageSubscription {
private final long pageId;
// Confirmed ACKs on this page
private final Set<PagePosition> acks = Collections.synchronizedSet(new LinkedHashSet<PagePosition>());
private Set<PagePosition> acks = Collections.synchronizedSet(new LinkedHashSet<PagePosition>());
private WeakReference<PageCache> cache;
private final Set<PagePosition> removedReferences = new ConcurrentHashSet<>();
private Set<PagePosition> removedReferences = new ConcurrentHashSet<>();
// The page was live at the time of the creation
private final boolean wasLive;