[ARTEMIS-3581] Allow setMaxSizeBytes(0) to indicate an address that will always page

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.19.0
• Fix Version/s: 2.20.0
• Component/s: Broker, Configuration
• Assignee: Gary Tully
• Reporter: Gary Tully
• Created: 16/Nov/21 16:14
• Updated: 15/Dec/21 13:58
• Resolved: 18/Nov/21 13:17

Description

Currently for force paging on an address, for a DLQ for example, you would set max-size-bytes to some small number, e.g.:

   <address-full-policy>PAGE</address-full-policy>
   <max-size-bytes>1</max-size-bytes>

However, the broker will complain with:

2021-11-15 16:21:51,606 ERROR [org.apache.activemq.artemis.core.server] AMQ224000: Failure in initialisation: java.lang.IllegalStateException: java.lang.IllegalStateException: pageSize for address DLQ.mytest >= maxSize. Normally pageSize should be significantly smaller than maxSize, ms: 1 ps 1024

You could go ahead and downsize the page-size-bytes as well, but you don't want to cripple de-page or page-in and use a reasonable value and some memory!

   <address-full-policy>PAGE</address-full-policy>
   <max-size-bytes>256</max-size-bytes>
   <page-size-bytes>128</page-size-bytes>

It should be sufficient to just set:

   <address-full-policy>PAGE</address-full-policy>
   <max-size-bytes>0</max-size-bytes>

Issue Links

• links to: GitHub Pull Request #3856