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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7916) Stress should collect and cross-cluster GC statistics
Date Mon, 15 Sep 2014 15:31:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134014#comment-14134014
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T Jake Luciani commented on CASSANDRA-7916:
-------------------------------------------

Just tested this and the summary stats are not working for GC

{code}
Results:
op rate                   : 96
partition rate            : 2389
row rate                  : 105789
latency mean              : 166.1
latency median            : 141.6
latency 95th percentile   : 399.9
latency 99th percentile   : 512.2
latency 99.9th percentile : 858.7
latency max               : 962.3
total gc count            : 0
total gc mb               : 0
total gc time (s)         : 0
avg gc time(ms)           : NaN
stdev gc time(ms)         : 0
Total operation time      : 00:00:39
{code}

> Stress should collect and cross-cluster GC statistics
> -----------------------------------------------------
>
>                 Key: CASSANDRA-7916
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7916
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Benedict
>            Assignee: Benedict
>            Priority: Minor
>             Fix For: 2.1.1
>
>
> It would be useful to see stress outputs deliver cross-cluster statistics, the most useful
being GC data. Some simple changes to GCInspector collect the data, and can deliver to a nodetool
request or to stress over JMX.



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