Re: nodetool cfhistograms

2016-10-04 Thread Sungju Hong
Sorry, I had a typing error. nodetool cfhistograms ouput shows like below. ks1/cf1 histograms Offset SSTables Write Latency Read Latency Row Size Column Count 1 0 0 0 0 35565129 2

nodetool cfhistograms

2016-10-04 Thread Sungju Hong
Hello, nodetool cfhistograms ouput shows like below. ks1/cf1 histograms Offset SSTables Write Latency Read Latency Row Size Column Count 1 0 0 0 0 35565129 2 0

Re: What time range does nodetool cfhistograms use?

2014-11-16 Thread Clint Kelly
ency and Read Latency will be reset on >> node >> > start/restart and after running the cfhistograms command itself. >> > >> > The values of Row Size and Column Count are calculated at startup and >> then >> > re-evaluated during compaction. >> &g

Re: What time range does nodetool cfhistograms use?

2014-11-16 Thread DuyHai Doan
ated during compaction. > > > > > > Mark > > > > > > On 16 November 2014 17:12, Clint Kelly wrote: > >> > >> Hi all, > >> > >> Over what time range does "nodetool cfhistograms" operate? > >> > >> I am usi

Re: What time range does nodetool cfhistograms use?

2014-11-16 Thread Clint Kelly
t startup and then > re-evaluated during compaction. > > > Mark > > > On 16 November 2014 17:12, Clint Kelly wrote: >> >> Hi all, >> >> Over what time range does "nodetool cfhistograms" operate? >> >> I am using Cassandra 2.0.8.39.

Re: What time range does nodetool cfhistograms use?

2014-11-16 Thread Mark Reddy
, Clint Kelly wrote: > Hi all, > > Over what time range does "nodetool cfhistograms" operate? > > I am using Cassandra 2.0.8.39. > > I am trying to debug some very high 95th and 99th percentile read > latencies in an application that I'm working on. > > I

What time range does nodetool cfhistograms use?

2014-11-16 Thread Clint Kelly
Hi all, Over what time range does "nodetool cfhistograms" operate? I am using Cassandra 2.0.8.39. I am trying to debug some very high 95th and 99th percentile read latencies in an application that I'm working on. I tried running nodetool cfhistograms to get a flavor for the

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
;> 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 periodica

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 Cassand

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

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-23 Thread Derek Williams
rites took 17, 7 >> writes took 20 and 19 writes took 24 >> >> Correct me if I am wrong. >> >> Thanks. >> -Wei >> >> -- >> *From:* Brian Tarbox >> *To:* user@cassandra.apache.org >> *Sent:* Tuesday, January 22, 20

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-23 Thread Brian Tarbox
; > -- > *From:* Brian Tarbox > *To:* user@cassandra.apache.org > *Sent:* Tuesday, January 22, 2013 7:27 AM > *Subject:* Re: Is this how to read the output of nodetool cfhistograms? > > Indeed, but how many Cassandra users have the good fortune to

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Wei Zhu
Sent: Tuesday, January 22, 2013 7:27 AM Subject: Re: Is this how to read the output of nodetool cfhistograms? Indeed, but how many Cassandra users have the good fortune to stumble across that page?  Just saying that the explanation of the very powerful nodetool commands should be more front and c

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Brian Tarbox
Indeed, but how many Cassandra users have the good fortune to stumble across that page? Just saying that the explanation of the very powerful nodetool commands should be more front and center. Brian On Tue, Jan 22, 2013 at 10:03 AM, Edward Capriolo wrote: > This was described in good detail he

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Edward Capriolo
This was described in good detail here: http://thelastpickle.com/2011/04/28/Forces-of-Write-and-Read/ On Tue, Jan 22, 2013 at 9:41 AM, Brian Tarbox wrote: > Thank you! Since this is a very non-standard way to display data it > might be worth a better explanation in the various online documenta

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Brian Tarbox
Thank you! Since this is a very non-standard way to display data it might be worth a better explanation in the various online documentation sets. Thank you again. Brian On Tue, Jan 22, 2013 at 9:19 AM, Mina Naguib wrote: > > > On 2013-01-22, at 8:59 AM, Brian Tarbox wrote: > > > The output

Re: Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Mina Naguib
On 2013-01-22, at 8:59 AM, Brian Tarbox wrote: > The output of this command seems to make no sense unless I think of it as 5 > completely separate histograms that just happen to be displayed together. > > Using this example output should I read it as: my reads all took either 1 or > 2 sstabl

Is this how to read the output of nodetool cfhistograms?

2013-01-22 Thread Brian Tarbox
The output of this command seems to make no sense unless I think of it as 5 completely separate histograms that just happen to be displayed together. Using this example output should I read it as: my reads all took either 1 or 2 sstable. And separately, I had write latencies of 3,7,19. And separ