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https://issues.apache.org/jira/browse/ARTEMIS-1096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15959421#comment-15959421
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Justin Bertram commented on ARTEMIS-1096:
-----------------------------------------
The default {{<address-full-policy>}} is {{PAGE}}, but the default
{{<max-size-bytes>}} is {{-1}} (i.e. infinite) so the address is never
considered full and hence the full-policy is never applied. There is a
{{WARN}} in place to notify users of potential OOME given their address
configuration, but the logic is flawed in that it simply adds up the
{{<max-size-byte>}} values for each address and doesn't consider {{-1}} to be a
special case. That should be fixed.
In any event, this is not a default configuration so a user would have to
explicitly create this configuration (i.e. removing the default
{{<address-settings>}} and {{<global-max-size>}}). My assumption (perhaps
naively) is that the user knows what they're doing. The default
{{<global-max-size>}} is {{-1}} (i.e. infinite). If we detected this value and
applied some kind of automatic override then {{-1}} is no longer a valid option
which means we are forcing the user to use a global-max whether they want to or
not. At first blush, this seems wrong although I'm certainly open to further
discussion.
> Load tests exhaust memory if global-max-size is not set
> -------------------------------------------------------
>
> Key: ARTEMIS-1096
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1096
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Environment: Fedora 25 x86-64, 16G memory
> Reporter: Justin Ross
> Priority: Minor
>
> With the following config (note commented out global-max-size), testq doesn't
> page or block. Under load tests, the broker eventually dies with an OOME. I
> propose that there be some fallback code-level default for global-max-size.
> {noformat}
> <?xml version='1.0'?>
> <configuration xmlns="urn:activemq"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="urn:activemq /schema/artemis-configuration.xsd">
> <core xmlns="urn:activemq:core"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="urn:activemq:core ">
> <!-- <global-max-size>100Mb</global-max-size> -->
> <acceptors>
> <acceptor
> name="artemis">tcp://localhost:5672?protocols=AMQP,CORE,OPENWIRE</acceptor>
> </acceptors>
> <addresses>
> <address name="testq">
> <anycast>
> <queue name="testq">
> <durable>false</durable>
> </queue>
> </anycast>
> </address>
> </addresses>
> <security-settings>
> <security-setting match="#">
> <permission type="consume" roles="admin"/>
> <permission type="browse" roles="admin"/>
> <permission type="send" roles="admin"/>
> </security-setting>
> </security-settings>
> </core>
> </configuration>
> {noformat}
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