[ https://issues.apache.org/jira/browse/CASSANDRA-6890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948637#comment-13948637 ]
Jonathan Ellis commented on CASSANDRA-6890: ------------------------------------------- So to clarify: this patch causes a performance regression that you're working on resolving? > Remove mmap'ed i/o from read path > --------------------------------- > > Key: CASSANDRA-6890 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6890 > Project: Cassandra > Issue Type: Improvement > Reporter: Joshua McKenzie > Assignee: Joshua McKenzie > Priority: Minor > Fix For: 3.0 > > Attachments: mmap_perf.txt > > > Since we actively unmap unreferenced SSTR's and also copy data out of those > readers on the read path, the current memory mapped i/o is a lot of > complexity for very little payoff. Clean out the mmapp'ed i/o on the read > path. -- This message was sent by Atlassian JIRA (v6.2#6252)