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https://issues.apache.org/jira/browse/ARTEMIS-2321?focusedWorklogId=234166&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-234166
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ASF GitHub Bot logged work on ARTEMIS-2321:
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Author: ASF GitHub Bot
Created on: 28/Apr/19 11:42
Start Date: 28/Apr/19 11:42
Worklog Time Spent: 10m
Work Description: franz1981 commented on issue #2645: ARTEMIS-2321 Paging
scalability and GC improvement
URL: https://github.com/apache/activemq-artemis/pull/2645#issuecomment-487371327
@qihongxu @wy96f it should improve paging scalability over the same address
(with topic for sure) a lot, especially with small heaps (and GC is cleaning up
many requested PageCaches)
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Issue Time Tracking
-------------------
Worklog Id: (was: 234166)
Time Spent: 1h 40m (was: 1.5h)
> Paging scalability and GC improvements
> --------------------------------------
>
> Key: ARTEMIS-2321
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2321
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.8.0
> Reporter: Francesco Nigro
> Priority: Major
> Fix For: 2.9.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> PageCursorProviderImpl::getPageCache's on cache miss is blocking the whole
> softCache until the requested page isn't fully read, making other threads
> unable to make progress by querying the cache.
> It would be better to make the page read operation a non-blocking operation
> for the whole cache, allowing threads that need different pageId to make
> progress.
> Other improvements:
> * PageCursorProviderImpl can use specialized primitive hash maps to reduce
> memory footprint (that would cause some page entries to be collected
> prematurely)
> * PageCache children can avoid to maintain a reference to a Page
> * PagingStoreImpl perform many unnecessary volatile stores/loads and some
> fields can be turned into plain ones, avoiding expensive atomic operations
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