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Posted to notifications@couchdb.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/02/01 19:44:51 UTC
[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file
causes extra IO and binary memory usage
[ https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848848#comment-15848848 ]
ASF GitHub Bot commented on COUCHDB-3284:
-----------------------------------------
GitHub user nickva opened a pull request:
https://github.com/apache/couchdb-couch/pull/225
Remove dead code from couch_file
This code was left over after removing 8kB read-ahead
https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f
COUCHDB-3284
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloudant/couchdb-couch couchdb-3284-remove-dead-code
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/couchdb-couch/pull/225.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #225
----
commit bf12a7a3336bd438493e7db1d090160f1c1a09f3
Author: Nick Vatamaniuc <va...@apache.org>
Date: 2017-02-01T19:42:59Z
Remove dead code from couch_file
This code was left over after removing 8kB read-ahead
https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f
COUCHDB-3284
----
> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> --------------------------------------------------------------------
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Affects Versions: 2.0.0
> Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, binary memory usage but doesn't speed-up
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