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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-3534) Remove memory emergency pressure valve
Date Thu, 20 Feb 2014 19:13:27 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-3534:
--------------------------------------

    Summary: Remove memory emergency pressure valve  (was: Enhance or remove memory emergency
pressure valve)

> Remove memory emergency pressure valve
> --------------------------------------
>
>                 Key: CASSANDRA-3534
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3534
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1.0
>            Reporter: Vijay
>            Assignee: Aleksey Yeschenko
>            Priority: Minor
>             Fix For: 2.0 beta 1
>
>         Attachments: 3534.txt
>
>
> Seems like when these thresholds are reached we are trying to reduce the keycache and
Memtable sizes, but in the trunk memtable is moved off-heap hence reducing that will not actually
help.
> Reducing the keycache might help but we might want to provide a way to bring the cache
level back to the configured value when the pressure goes away.
> Conversation from IRC: we might want to remove these setting all together after global
keycache.



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