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From aaron morton <>
Subject Re: Tombstones and memtable_operations
Date Tue, 19 Apr 2011 20:16:01 GMT
I think their may be an issue here, we are counting the number of columns in the operation.
When deleting an entire row we do not have a column count. 

Can you let us know what version you are using and how you are doing the delete ? 


On 20 Apr 2011, at 04:21, Héctor Izquierdo Seliva wrote:

> Ok, I've read about gc grace seconds, but i'm not sure I understand it
> fully. Untill gc grace seconds have passed, and there is a compaction,
> the tombstones live in memory? I have to delete 100 million rows and my
> insert rate is very low, so I don't have a lot of compactions. What
> should I do in this case? Lower the major compaction threshold and
> memtable_operations to some very low number?
> Thanks
> El mar, 19-04-2011 a las 17:36 +0200, Héctor Izquierdo Seliva escribió:
>> Hi everyone. I've configured in one of my column families
>> memtable_operations = 0.02 and started deleting keys. I have already
>> deleted 54k, but there hasn't been any flush of the memtable. Memory
>> keeps pilling up and eventually nodes start to do stop-the-world GCs. Is
>> this the way this is supposed to work or have I done something wrong?
>> Thanks!

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