Re: nodetool cfhistograms refresh

2013-10-01 Thread Tyler Hobbs
On Tue, Oct 1, 2013 at 3:52 PM, Rene Kochen wrote: > Does that mean that cfhistograms scans all Statistics.db files in order to > populate the "Row Size" and "Column Count" values? On startup, yes. After that, it should be updated as new SSTables are created. -- Tyler Hobbs DataStax

Re: nodetool cfhistograms refresh

2013-10-01 Thread Rene Kochen
Thanks! Does that mean that cfhistograms scans all Statistics.db files in order to populate the "Row Size" and "Column Count" values? 2013/10/1 Tyler Hobbs > > On Tue, Oct 1, 2013 at 2:34 PM, Rene Kochen > wrote: > >> However, "Row Size" and "Column Count" keep the values. When are they >> re

Re: nodetool cfhistograms refresh

2013-10-01 Thread Tyler Hobbs
On Tue, Oct 1, 2013 at 2:34 PM, Rene Kochen wrote: > However, "Row Size" and "Column Count" keep the values. When are they > re-evaluated? They are re-evaluated during compaction. -- Tyler Hobbs DataStax

Re: nodetool cfhistograms refresh

2013-10-01 Thread Rene Kochen
If I look at Read Latency I see indeed that they are reset during two runs of cfhistograms. However, "Row Size" and "Column Count" keep the values. When are they re-evaluated? Thanks! Rene 2013/10/1 Richard Low > On 1 October 2013 16:21, Rene Kochen wrote: > >> Quick question. >> >> I am usi

Re: nodetool cfhistograms refresh

2013-10-01 Thread Richard Low
On 1 October 2013 16:21, Rene Kochen wrote: > Quick question. > > I am using Cassandra 1.0.11 > > When is nodetool cfhistograms output reset? I know that data is collected > during read requests. But I am wondering if it is data since the beginning > (start of Cassandra) or if it is reset periodi

nodetool cfhistograms refresh

2013-10-01 Thread Rene Kochen
Quick question. I am using Cassandra 1.0.11 When is nodetool cfhistograms output reset? I know that data is collected during read requests. But I am wondering if it is data since the beginning (start of Cassandra) or if it is reset periodically? Thanks! Rene