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https://issues.apache.org/jira/browse/TS-1215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13876382#comment-13876382
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Bryan Call commented on TS-1215:
--------------------------------

I agree this complex and difficult to implement.  It would be similar to Linux 
and how it dynamically sizes buffers and cache memory.  If we had more 
developers working on ATS it might be something we could pull of, but I don't 
think we would be able to do a reasonable job on implementing such a feature.

> Ram Cache: we should check system free memory before we setup the 
> ram_cache_size
> --------------------------------------------------------------------------------
>
>                 Key: TS-1215
>                 URL: https://issues.apache.org/jira/browse/TS-1215
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 3.1.3
>            Reporter: Zhao Yongming
>            Priority: Minor
>
> when your system run out of memory, it is a very bad situation. we should 
> prevent from ram cache use more memories than system free:
> first, during cache init and ram_cache init, be sure to check free.
> second, can we make the ram_cache a dynamic system? I think that is my long 
> term wish for ram_cache



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