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From Jahangir Mohammed <md.jahangi...@gmail.com>
Subject Re: What sort of load do the tombstones create on the cluster?
Date Sun, 20 Nov 2011 21:54:18 GMT
Mostly, they are I/O and CPU intensive during major compaction. If ganglia
doesn't have anything suspicious there, then what is performance loss ?
Read or write?
On Nov 17, 2011 1:01 PM, "Maxim Potekhin" <potekhin@bnl.gov> wrote:

> In view of my unpleasant discovery last week that deletions in Cassandra
> lead to a very real
> and serious performance loss, I'm working on a strategy of moving forward.
>
> If the tombstones do cause such problem, where should I be looking for
> performance bottlenecks?
> Is it disk, CPU or something else? Thing is, I don't see anything
> outstanding in my Ganglia plots.
>
> TIA,
>
> Maxim
>
>

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