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[bioontology-support] NCBO memory problem

Paul R Alexander palexander at
Mon Dec 5 10:27:49 PST 2011

Memory usage will vary on how you are utilizing the Virtual Appliance 
and exactly what is happening on the system at any given point. The 
portions of the application that tend to use a lot of memory include: 
Lucene search index, ontology parsing, and the Rails application when 
experiencing mid-high traffic loads (~20 concurrent users).

We haven't heard of other users having memory issues, but again it is 
very dependent on how you are using the Appliance. Your virtualization 
environment should include options for increasing the memory available 
to the Appliance, so starting there is what I would do.

Paul R Alexander
Web / UI Developer
NCBO BioPortal
Stanford Center for Biomedical Informatics Research

On 12/2/11 12:03 AM, jpcik wrote:
> I am using v 0.3 of NCBO. We followed the instructions and the documentation
> a couple of weeks ago. It seemed tu run fine, but I noticed that
>   Bioportal becomes unresponsive after a while, (we get database connection
> errors constanly). I am under the impression that it might be a memory
> problem ( the VM is running on a machine with only 3GB of memory). Does
> Bioportal require more than 4G of memory to run properly or maybe the source
> of our problem is something else. I  thought about that because you have
> this heavy cache implementation that might require lots of resources....
> --
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