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https://issues.apache.org/jira/browse/ARTEMIS-2399?focusedWorklogId=267279&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-267279
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ASF GitHub Bot logged work on ARTEMIS-2399:
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Author: ASF GitHub Bot
Created on: 26/Jun/19 05:51
Start Date: 26/Jun/19 05:51
Worklog Time Spent: 10m
Work Description: wy96f commented on issue #2730: ARTEMIS-2399 Fix
performance degradation when there are a lot of subscribers
URL: https://github.com/apache/activemq-artemis/pull/2730#issuecomment-505729272
The page index cache would reside until the page is deleted when
> @wy96f thanks to have tried! Did you have considered the other comments?
Related to putting the file offset into the pages message reference? This would
avoid to creating the Map<Integer,Integer>
For the created page reference, we can record the file offset which can be
used to seek and read file if message is removed by gc. But for the message not
yet depaged or not committed in a page transaction, how do we read message and
create reference just according to page number and message number?
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Issue Time Tracking
-------------------
Worklog Id: (was: 267279)
Time Spent: 3h 10m (was: 3h)
> Fix performance degradation when there are a lot of subscribers
> ---------------------------------------------------------------
>
> Key: ARTEMIS-2399
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2399
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.9.0
> Environment: broker 2.9.0
> cpu: 4 cores, memory: 8G, disk: ssd 500G
> broker.xml:
> <thread-pool-max-size>60</thread-pool-max-size>
> <address-setting match="#">
> <max-size-bytes>51Mb</max-size-bytes>
> <page-size-bytes>50Mb</page-size-bytes>
> <page-max-cache-size>1</page-max-cache-size>
> <address-full-policy>PAGE</address-full-policy>
> </address-setting>
> <message-expiry-scan-period>-1</message-expiry-scan-period>
> Reporter: yangwei
> Priority: Major
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> We noticed that there was a significant drop in performance when entering
> page mode in the case of multiple subscribers.
> We created a topic and 100 queues bound to it. We ran our _GrinderRunner
> test_ in our inner test infra cluster with 500 threads producing message and
> 560 threads, each one picked a random queue to subscribe. The test showed
> performance is bad: 13000 msg/s sent and 5000 msg/s received.
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