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From Bryan Talbot <>
Subject Re: index_interval
Date Tue, 14 May 2013 04:10:25 GMT
So will cassandra provide a way to limit its off-heap usage to avoid
unexpected OOM kills?  I'd much rather have performance degrade when 100%
of the index samples no longer fit in memory rather than the process being
killed with no way to stabilize it without adding hardware or removing data.


On Fri, May 10, 2013 at 7:44 PM, Edward Capriolo <>wrote:

> If you use your off heap memory linux has an OOM killer, that will kill a
> random tasks.
> On Fri, May 10, 2013 at 11:34 AM, Bryan Talbot <>wrote:
>> If off-heap memory (for indes samples, bloom filters, row caches, key
>> caches, etc) is exhausted, will cassandra experience a memory allocation
>> error and quit?  If so, are there plans to make the off-heap usage more
>> dynamic to allow less used pages to be replaced with "hot" data and the
>> paged-out / "cold" data read back in again on demand?

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