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Posted to commits@cassandra.apache.org by "Ariel Weisberg (JIRA)" <ji...@apache.org> on 2015/05/27 22:32:30 UTC

[jira] [Updated] (CASSANDRA-8584) Add rate limited logging of failed trySkipCache calls and commit log lag

     [ https://issues.apache.org/jira/browse/CASSANDRA-8584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ariel Weisberg updated CASSANDRA-8584:
--------------------------------------
    Summary: Add rate limited logging of failed trySkipCache calls and commit log lag  (was: Add strerror output on failed trySkipCache calls)

> Add rate limited logging of failed trySkipCache calls and commit log lag
> ------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8584
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8584
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Joshua McKenzie
>            Assignee: Ariel Weisberg
>            Priority: Trivial
>             Fix For: 2.1.x
>
>         Attachments: 8584_v1.txt, NoSpamLogger.java, nospamlogger.txt
>
>
> Since trySkipCache returns an errno rather than -1 and setting errno like our other CLibrary calls, it's thread-safe and we could print out more helpful information if we failed to prompt the kernel to skip the page cache.  That system call should always succeed unless we have an invalid fd as it's free to ignore us.



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