cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-2142) Add "reduce memory usage because I tuned things poorly" feature
Date Tue, 08 Feb 2011 20:37:57 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-2142:
--------------------------------------

    Attachment: 2142.txt

adds StorageService.reduceHeapUsage, which flushes the largest memtables and caps cache size
when GCInspector notices that heap post-full-collection is within a configurable threshold
of completely full.

The threshold defaults to 100% if it is not specified in .yaml (i.e., off for people upgrading)
and 95% in the sample .yaml.

> Add "reduce memory usage because I tuned things poorly" feature
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-2142
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2142
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>              Labels: ponies
>             Fix For: 0.7.1
>
>         Attachments: 2142.txt
>
>
> Users frequently create too many columnfamilies, set the memtable thresholds too high
(or adjust throughput while ignoring operations), and/or set caching thresholds too high.
 Then their server OOMs and they tell their friends Cassandra sucks.

-- 
This message is automatically generated by JIRA.
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message