michael goulish created DISPATCH-369: ----------------------------------------
Summary: investigate excursions in memory usage Key: DISPATCH-369 URL: https://issues.apache.org/jira/browse/DISPATCH-369 Project: Qpid Dispatch Issue Type: Bug Components: Router Node Affects Versions: 0.6.0 Reporter: michael goulish Assignee: michael goulish I don't know if this is a bug or not. I'm Jirifying it as a way of remembering an interesting behavior that my testing has shown, so that I can continue developing the testing and come back to this later. ... While measuring router memory usage under varying message rate and number of senders -- when I run the same test multiple times, I am occasionally (about 1 in 4 times or so) seeing a test in which memory usage is much higher than the others. For example: In this test: { straight-through topology ( 1 sender --> 1 address --> 1 receiver ) 200 senders 200 messages per second 100 bytes per message } I record router memory usage at the point when all receivers are just hitting 10,000 messages. (This is because it grows -- see previous JIRA.) In three iterations I get the following memory usage: 66 MB 63 MB 181 MB Something similar, but less drastic, happened occasionally at lower levels in the test. In this case, this is a tripling of memory usage for the same scenario. I doubt that this is the result of slightly different timing in a block allocation of data structures. What just happened? Start by investigating with "qdstat -m" and see if that shows some or all of the difference. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org