activemq-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
Subject svn commit: r856668 - in /websites/production/activemq/content: cache/main.pageCache how-can-i-support-priority-queues.html
Date Sun, 31 Mar 2013 03:29:06 GMT
Author: buildbot
Date: Sun Mar 31 03:29:06 2013
New Revision: 856668

Production update by buildbot for activemq


Modified: websites/production/activemq/content/cache/main.pageCache
Binary files - no diff available.

Modified: websites/production/activemq/content/how-can-i-support-priority-queues.html
--- websites/production/activemq/content/how-can-i-support-priority-queues.html (original)
+++ websites/production/activemq/content/how-can-i-support-priority-queues.html Sun Mar 31
03:29:06 2013
@@ -93,6 +93,7 @@
 <p>Since the message cursors (and client side) implement strict ordering of priorities,
it's possible to observe strict priority ordering if message dispatching can happen from the
cache and not have to hit the disk (i.e., your consumers are fast enough to keep up with producers),
or if you're using non-persistent messages that never have to flush to disk (which happens
by default using the FilePendingMessageCursor). However, once you hit a situation where consumers
are slow, or producers are just significantly faster, you'll observe that the cache will fill
up (possibly with lower priority messages) while higher priority messages get stuck on disk
and not available until they're paged in. In this case, you can make a decision to tradeoff
optimized message dispatching for priority enforcement. You can disable the cache, message
expiration check, and lower you consumer prefetch to 1 to ensure getting the high priority
messages from the store ahead of lower priority messages:<
 <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
 <pre class="code-java">

View raw message