That does sound suspicious, and I believe I've seen users describe similar (though not quite so extreme) behavior in the past, so there definitely might be something here.
Can you please provide some additional information? What version of ActiveMQ are you running? What are the limits you're setting on the memory store, and on whichever persistence store you're using? Have you confirmed that your messages for that topic really are being written to the persistence store? How big are your messages? Do you ever see PFC kick in (even though it's not doing so at the point you quoted the logs for), and if so can you please describe when it does and what's different then if you're aware of anything? What type of memory cursor ( http://activemq.apache.org/message-cursors.html) are you using for this topic? Do you see any other errors or warnings in the logs, even if it's not immediately obvious how/if they would relate to the behavior you described? Tim On May 22, 2017 2:39 PM, "rth" <robert.huff...@gmail.com> wrote: I'm seeing messages like this in my logs: 2017-05-17 12:42:23.610+0000 | DEBUG | org.apache.activemq.usage.Usage | | main | default:memory:topic://some.topic:memory: usage change from: 10694% of available memory, to: 10695% of available memory Flow control is enabled, and messages are being published as persistent. What should I make of this message? -- View this message in context: http://activemq.2283324.n4. nabble.com/How-can-memory-usage-be-at-10-000-of-available-memory-tp4726425. html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
