[
https://issues.apache.org/jira/browse/CASSANDRA-3376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis resolved CASSANDRA-3376.
---------------------------------------
Resolution: Won't Fix
Bah, further investigation shows that fincore [http://lwn.net/Articles/371538/]
was never merged to Linux mainline, and it's not worth supporting this for only
mmapped i/o.
> Track buffer cache hit rate with mincore
> ----------------------------------------
>
> Key: CASSANDRA-3376
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3376
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jonathan Ellis
> Priority: Minor
> Labels: ponies
>
> We could use mincore on, say, 1% of reads to be able to report actual buffer
> cache hit rate. This would be useful when troubleshooting slow reads, e.g.,
> are reads to CF X slow because it's hitting disk, or because there are a lot
> of tombstones in the row?
--
This message was sent by Atlassian JIRA
(v6.1#6144)
