[rabbitmq-discuss] RabbitMQ crash due to out of memory

Matthias Radestock matthias at rabbitmq.com
Tue Aug 28 22:00:45 BST 2012

On 28/08/12 21:40, Chen, Bin wrote:
> The version is RabbitMQ 2.8.4 on Erlang R15B01.

Is that the 32-bit or 64-bit version of Erlang? If the former then 
please switch to the latter.

> The high memory watermark was set to 1.6 GB. See the attached picture.

When you say "set", do you mean you changed it from the default values?

1.6GB at the default threshold of 40% would imply a detected usable 
memory of 4GB, but the crash dump indicates that Erlang failed to 
allocate ~40Mb of memory when it had just 2.6GB already allocated. So either
- the usable system memory was detected incorrectly, or
- the memory HWM was increased from the default, or
- other applications are using the memory, or
- the crash dump significantly underreported the memory usage



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